Answer (a): Andhra. DHANYAKATAKA was an ancient Buddhist site located in present-day ANDHRA PRADESH, on the south bank of the Krishna River near AMARAVATI (modern Guntur district). It flourished as a prominent BUDDHIST CENTRE under the MAHASANGHIKAS — one of the earliest Buddhist schools that broke away from the original Sthaviravadins (parent of Theravada) at the Second Buddhist Council. The Mahasanghikas (literally 'Great Sangha') laid foundations for what later evolved into MAHAYANA Buddhism. Dhanyakataka was the SATAVAHANA-era capital and a thriving Buddhist hub from the 3rd century BCE; the famous AMARAVATI STUPA stood here. Hsuan Tsang visited in 7th c CE.

• (b) Gandhara — northwestern Buddhist centre (modern Pakistan-Afghanistan), associated with Sarvastivadins.
• (c) Kalinga — Odisha; Buddhist after Ashoka's Kalinga War, but not Mahasanghika centre.
• (d) Magadha — Bihar; original Buddhist heartland but Mahasanghikas had moved south.

Answer (b): Only two.

• S1 WRONG — The CONCEPT OF STUPA is NOT BUDDHIST IN ORIGIN. It evolved from PRE-BUDDHIST BURIAL MOUNDS (megalithic cairns over royal/heroic remains) found in Vedic and earlier traditions. Buddhism ADOPTED and ELABORATED the stupa form for relic veneration; it didn't originate it. Classic origin-attribution manipulation.
• S2 CORRECT — Stupas were GENERALLY REPOSITORIES OF RELICS — bone fragments, ashes, and personal items of Buddha or revered Buddhist saints (sariraka stupas). Examples: Sanchi, Amaravati, Bharhut, Sarnath stupas ✓.
• S3 CORRECT — Stupas were both VOTIVE (offered as personal religious dedication, often by pilgrims) and COMMEMORATIVE (marking events in Buddha's life — birth, enlightenment, first sermon, death). Eight Mahaparinirvana stupas at sites like Lumbini, Bodhgaya, Sarnath, Kushinagar are classic examples ✓.

Answer (b): ports. KORKAI, POOMPUHAR, AND MUCHIRI were all ancient SOUTH INDIAN PORT CITIES that flourished during the SANGAM PERIOD (c. 300 BCE – 300 CE):

• KORKAI — Pandya port at the mouth of the Tamraparani river (Tirunelveli district, TN); famous for pearl fishery.
• POOMPUHAR (Kaveripoompattinam) — Chola port at the mouth of the Cauvery river (Mayiladuthurai district, TN); great Chola maritime hub mentioned in Silappadikaram.
• MUCHIRI (Muziris) — Chera port on the Malabar Coast (modern Pattanam, Kerala); famous Indo-Roman trade entrepôt; pepper trade with Rome.

These were major nodes of INDIA'S WESTERN AND EASTERN COASTAL TRADE NETWORK with Rome, Southeast Asia.

• (a) capital cities — wrong (Madurai, Uraiyur, Vanji were capitals).
• (c) iron-and-steel making centres — wrong (no such association).
• (d) Jain Tirthankara shrines — wrong (no Jain association).

Answer (d): A king defeated in a battle committing ritual suicide by starving himself to death. 'VATTAKIRUTAL' (also Vatakkiruttal, literally 'sitting facing north') was an ANCIENT TAMIL SANGAM-ERA HEROIC PRACTICE — a defeated king or warrior, after losing in battle, would COMMIT RITUAL SUICIDE BY STARVING HIMSELF TO DEATH while sitting facing north (the auspicious direction). It was considered an honourable death preserving the warrior's dignity. Mentioned in Sangam puram (heroic) poems as part of the Tamil Veerasaivagam tradition.

• (a) Women bodyguards — wrong (separate Sangam practice referenced occasionally).
• (b) Royal court philosophical assemblies — wrong.
• (c) Girls scaring birds from fields — wrong (different agrarian Sangam practice).
• (d) ✓ — exactly captures the ritual death-by-starvation tradition.

Answer (d): None. NONE of the four dynasties were established in EARLY EIGHTH CENTURY AD (c. 700-750 CE):

• HOYSALA dynasty was founded by Sala in c. 1006 CE (rose under Vinayaditya, peaked under Vishnuvardhana 1108 CE). Karnataka — 11th-13th c CE.
• GAHADAVALA dynasty (Govindachandra, Jaichandra) was founded c. 1090 CE in Kannauj/Banaras. North India — 11th-12th c CE.
• KAKATIYA dynasty was founded by Beta-I in c. 950 CE (peaked under Ganapati, Rudramadevi). Telangana — 10th-14th c CE.
• YADAVA (Seuna) dynasty was founded c. 850-900 CE; rose to prominence under Bhillama V c. 1187 CE. Devagiri-Maharashtra — 9th-14th c CE.

All four are ELEVENTH-TO-THIRTEENTH CENTURY medieval regional kingdoms — none from the early 8th century.

Answer (b): Only two.

• Pair 1 WRONG — DEVICHANDRAGUPTAM is by VISHAKHADATTA (also author of Mudrarakshasa), NOT Bilhana. Vishakhadatta was a Sanskrit dramatist of the Gupta era. Bilhana wrote Vikramankadevacharita (biography of Vikramaditya VI of Western Chalukyas). Classic author misattribution.
• Pair 2 CORRECT — HAMMIRA-MAHAKAVYA is a Sanskrit historical poem by NAYACHANDRA SURI (15th c CE Jain monk) — biography of Hammira Chauhan (Ranthambore king who fought Ala-ud-din Khalji) ✓.
• Pair 3 WRONG — MILINDA-PANHA ('Questions of Milinda') is a Pali Buddhist text, attributed to NAGASENA (Buddhist monk who debated Greco-Bactrian king Menander/Milinda), NOT Nagarjuna. Classic Buddhist scholar misattribution.
• Pair 4 CORRECT — NITIVAKYAMRITA is a Sanskrit treatise on polity by SOMADEVA SURI (10th c CE Jain scholar) — work on statecraft and ethics ✓.

Two correct pairs (Hammira-Mahakavya, Nitivakyamrita).

Answer (b): Jainism. The quote 'Souls are not only the property of animal and plant life, but also of rocks, running water and many other natural objects not looked on as living by other religious sects' DIRECTLY REFLECTS JAINISM'S COSMOLOGICAL DOCTRINE OF JIVA (souls). Jain philosophy classifies all beings into TWO CATEGORIES:

• JIVA (souls) — present in animals, plants, micro-organisms, AND in supposedly inanimate objects: earth (prithvikaya), water (apkaya), fire (tejaskaya), air (vayukaya), and plants (vanaspatikaya). Each has a soul.
• AJIVA (non-souls) — only matter, space, time, motion, rest.

This radical animism underpins Jain AHIMSA (non-violence) — every action causes harm to some soul. Vegetarianism, walking carefully, water filtering all stem from this belief. Mahavira's most distinct doctrine.

• (a) Buddhism — denies eternal soul (anatta); doesn't extend souls to rocks/water.
• (c) Shaivism — Shiva-centric devotion, no such soul cosmology.
• (d) Vaishnavism — devotional Vishnu, no such soul cosmology.

Answer (a): Devarava I (Devaraya I). DEVARAYA I (1406-1422 CE), VIJAYANAGARA EMPEROR of the Sangama dynasty, CONSTRUCTED A LARGE DAM ACROSS THE TUNGABHADRA RIVER and a CANAL-CUM-AQUEDUCT FROM THE RIVER TO THE CAPITAL CITY (Vijayanagara/Hampi) — to ensure perennial water supply to the city for irrigation, urban use, and royal gardens. This was a major hydraulic-engineering achievement of medieval South India; the canals (Hiriya kalave) helped develop the agricultural hinterland and supported the empire's growing population. Italian traveller Niccolò de' Conti described Vijayanagara's prosperity during this period.

• (b) Mallikarjuna — later ruler (1446-1465).
• (c) Vira Vijaya (Vijaya Raya) — later (1422-1430).
• (d) Virupaksha — later (1465-1485).

Answer (c): Bahadur Shah. BAHADUR SHAH (Sultan of Gujarat, 1526-1537 CE) SURRENDERED DIU TO THE PORTUGUESE in 1535 — under the TREATY OF BASSEIN. Faced with threats from MUGHAL EMPEROR HUMAYUN (who had defeated him at the Battle of Mandsaur 1535), Bahadur Shah sought Portuguese help and ceded the strategic island of DIU to PORTUGAL in exchange for naval support. The Portuguese built the Diu Fort (1535-37) — one of their strongest fortresses in Asia. Bahadur Shah was later killed in a meeting with the Portuguese viceroy in 1537.

• (a) Ahmad Shah I (1411-1442) — founder of Ahmedabad; ruled before Portuguese contact.
• (b) Mahmud Begarha (1458-1511) — Gujarat's golden age; resisted early Portuguese.
• (d) Muhammad Shah — generic name; not associated with Diu surrender.

Answer (d): The Charter Act of 1833. The CHARTER ACT OF 1833 (Saint Helena Act) made the GOVERNOR-GENERAL OF BENGAL the GOVERNOR-GENERAL OF INDIA — a major centralization step. Lord William Bentinck became the first Governor-General of India (1833-1835). Key provisions:

• Centralized legislative power in the Governor-General-in-Council.
• Ended East India Company's commercial functions; converted into purely administrative entity.
• Provided for INDIANS in govt service (no discrimination on race/religion/birthplace).
• Authorized the LAW COMMISSION (which led to the IPC, CrPC, CPC).
• Macaulay served as the first 'Law Member.'
• (a) Regulating Act 1773 — created the post of Governor-General of Bengal (Warren Hastings).
• (b) Pitt's India Act 1784 — created the Board of Control (dual-control).
• (c) Charter Act 1793 — renewed EIC's commercial monopoly.

Answer (a): The principle of natural justice. 'DUE PROCESS OF LAW' is essentially the PRINCIPLE OF NATURAL JUSTICE — encompassing both PROCEDURAL FAIRNESS (notice, hearing, impartial tribunal) and SUBSTANTIVE FAIRNESS (laws must be just, fair, reasonable, not arbitrary). Indian constitutional jurisprudence:

• Originally, Article 21 ('procedure established by law') was narrowly interpreted (A.K. Gopalan 1950 — only procedure mattered).
• In MANEKA GANDHI v UNION OF INDIA (1978), SC EXPANDED Article 21 to incorporate DUE PROCESS — laws must be 'just, fair, and reasonable,' not just procedurally followed. This is the modern interpretation: Indian constitutional 'due process' embraces NATURAL JUSTICE PRINCIPLES.
• American Constitution explicitly uses 'Due Process'; Indian Constitution implicitly via Article 21 post-Maneka Gandhi.
• (b) Procedure established by law — narrower; older A.K. Gopalan interpretation.
• (c) Fair application of law — generic; subset of due process.
• (d) Equality before law — Article 14; related but distinct concept.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — In India, PRISONS are MANAGED BY STATE GOVERNMENTS with their OWN RULES AND REGULATIONS for day-to-day administration. 'Prisons' is a STATE SUBJECT under ENTRY 4 OF THE STATE LIST (List II of the Seventh Schedule) ✓.
• Statement-II WRONG — The PRISONS ACT, 1894 is a CENTRAL ACT (passed by the British Parliament/Indian Legislature), but it does NOT 'expressly keep the subject of prisons in the control of Provincial Governments.' The Constitution of India (1950), through the Seventh Schedule's State List, places prisons under State control — NOT the Prisons Act 1894. The Prisons Act provides the legal framework but the constitutional source of state-level control is the Seventh Schedule, not the Act itself. Classic constitutional-vs-statutory confusion.

Answer (c): It defines and limits the powers of government. The CHIEF/PRIMARY PURPOSE of a CONSTITUTION is to DEFINE AND LIMIT THE POWERS OF GOVERNMENT — establishing constitutional supremacy, separation of powers, fundamental rights, and rule-of-law constraints on state authority. This is the classical liberal-democratic conception (Aristotle, Locke, Madison, Ambedkar).

• (a) 'Determines the objective for the making of necessary laws' — too narrow; this is a derivative function.
• (b) 'Enables the creation of political offices and a government' — partial; ANY governmental document does this.
• (c) ✓ — captures both ASPECTS: ENABLING (defining) and CONSTRAINING (limiting) government — the dual purpose of a written constitution.
• (d) 'Secures social justice, social equality and social security' — these are AIMS reflected in the Preamble/DPSPs, but not the chief purpose of the Constitution itself (some constitutions don't have these aspirations).

The constitutional concept emphasizes 'limited government' as the irreducible chief purpose.

Answer (a): 1st Amendment. The 1st CONSTITUTIONAL AMENDMENT ACT, 1951 was widely believed to be enacted to OVERCOME JUDICIAL INTERPRETATIONS OF FUNDAMENTAL RIGHTS — specifically to address SC/HC rulings that had struck down zamindari abolition laws and other laws on FR grounds. Key features of 1st Amendment:

• Inserted ARTICLES 31A and 31B for protection of certain laws against fundamental rights challenge.
• Created the NINTH SCHEDULE — for laws immune from judicial review on FR grounds (initially populated with 13 land reform/zamindari abolition acts).
• Added 'reasonable restrictions' to ARTICLE 19(2) — adding 'public order' and other grounds to restrict free speech (Romesh Thappar & Brij Bhushan cases).
• Nehru-led Congress passed it to overcome Patna HC's striking down of Bihar Land Reforms Act.
• (b) 42nd Amendment (1976) — Indira Gandhi's 'mini-constitution' (DPSPs over FRs, etc.).
• (c) 44th Amendment (1978) — restored Article 19 etc. post-Emergency.
• (d) 86th Amendment — Right to Education (2002).

Answer (a): Only one. Classification of bodies as constitutional, statutory, or executive:

• 1. NATIONAL COMMISSION FOR BACKWARD CLASSES (NCBC) — CONSTITUTIONAL BODY, granted constitutional status by the 102nd CONSTITUTIONAL AMENDMENT ACT, 2018, inserting Article 338B ✓.
• 2. NATIONAL HUMAN RIGHTS COMMISSION (NHRC) — STATUTORY BODY (under Protection of Human Rights Act, 1993), NOT constitutional.
• 3. NATIONAL LAW COMMISSION (Law Commission of India) — EXECUTIVE BODY (constituted by Government order), NOT constitutional or even statutory.
• 4. NATIONAL CONSUMER DISPUTES REDRESSAL COMMISSION (NCDRC) — STATUTORY BODY (under Consumer Protection Act, 2019), NOT constitutional.

Only NCBC (1) is constitutional → Only one. Answer (a).

Answer (d): None.

• S1 WRONG — Per ARTICLE 71(2), if the election of the President is declared void, ACTS DONE BY HIM/HER IN THE PERFORMANCE OF DUTIES OF HIS/HER OFFICE BEFORE THE DATE OF DECISION ARE NOT INVALIDATED — they remain VALID despite the void declaration. The doctrine prevents administrative chaos from retroactive invalidation. The S1 'become invalid' is reversed.
• S2 WRONG — Article 62(2) and Section 5 of the Presidential and Vice-Presidential Elections Act 1952: ELECTION FOR THE PRESIDENT OF INDIA SHALL NOT BE POSTPONED ON THE GROUND THAT SOME LEGISLATIVE ASSEMBLIES HAVE BEEN DISSOLVED. The election proceeds with the available members of the Electoral College. Classic procedural-rule manipulation.
• S3 WRONG — When a Bill is presented to the President, the CONSTITUTION DOES NOT PRESCRIBE A TIME LIMIT within which the President must declare assent. Article 111 allows 'as soon as possible' but no fixed time-frame; this is a notorious constitutional gap (the 'pocket veto' loophole). Classic time-frame fabrication.

Answer (a): Only one. Finance Bill vs Money Bill (Articles 109, 110, 117):

• S1 WRONG — When Lok Sabha transmits a FINANCE BILL [non-money-bill type, Art 117(3)] to Rajya Sabha, RS CAN AMEND/REJECT just like any ordinary bill. So 'Rajya Sabha can amend or reject' is technically TRUE for ordinary financial bills — BUT the question's framing implies the standard Finance Bill (Annual Budget Finance Bill containing taxation), which is a MONEY BILL. UPSC marks this WRONG (because Finance Bill in budget context = Money Bill type, can't be amended/rejected by RS).
• S2 CORRECT — Per Article 109, when LS transmits a MONEY BILL to RS, RS CANNOT AMEND OR REJECT — it can only make RECOMMENDATIONS within 14 days (which LS can accept or reject). ✓
• S3 WRONG — Per ARTICLE 108, JOINT SITTING IS NEVER HELD FOR MONEY BILLS (since RS has no real veto over them anyway). For FINANCE BILLS that are NOT Money Bills (Art 117), JOINT SITTING IS POSSIBLE if there's deadlock. So the claim 'no joint sitting for Money Bill but joint sitting necessary for Finance Bill' inverts the structural difference. Classic procedural-rule manipulation.

Answer (b): Only two. COMMUNITY RESERVES (under Wildlife Protection Act 1972, Sections 36C-36D, Amendment 2002):

• S1 WRONG — Notification of an area as a Community Reserve is done by the STATE GOVERNMENT (not Central Government), in CONSULTATION WITH THE LOCAL COMMUNITY. The S1 'Central Government notifies' is the wrong tier of government.
• S2 WRONG — In a Community Reserve, the COMMUNITY RESERVE MANAGEMENT COMMITTEE (consisting of community representatives) becomes the GOVERNING AUTHORITY — NOT the Chief Wildlife Warden. The Warden has advisory role; the community is empowered. Classic governance-attribution manipulation.
• S3 CORRECT — HUNTING IS NOT ALLOWED in Community Reserves (per Section 36-D WPA) ✓.
• S4 CORRECT — People are allowed to COLLECT NON-TIMBER FOREST PRODUCE (NTFP), USE TRADITIONAL AGRICULTURE PRACTICES — community livelihoods are preserved. ✓

UPSC accepts: Only S3 and S4 are correct → Only two.

Answer (b): Only two. SCHEDULED AREAS in India (Article 244, Fifth Schedule):

• S1 CORRECT — Notification of a state's area as Scheduled Area takes place THROUGH AN ORDER OF THE PRESIDENT (Article 244(1) and Fifth Schedule Para 6) ✓.
• S2 CORRECT — In the existing Scheduled Areas Order 1950 (and amendments), the LARGEST ADMINISTRATIVE UNIT forming the Scheduled Area is the DISTRICT, AND THE LOWEST IS THE CLUSTER OF VILLAGES (or a tribal habitation block) ✓.
• S3 WRONG — Per the Fifth Schedule Para 3, the GOVERNOR (not the Chief Minister) of the state submits an ANNUAL REPORT regarding the administration of Scheduled Areas to the PRESIDENT (not the Union Home Ministry). Classic official-attribution and recipient-attribution manipulation.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — The SC has held in INDRA SAWHNEY v UNION OF INDIA (1992) and subsequent cases that RESERVATION POLICIES UNDER ARTICLE 16(4) ARE LIMITED BY ARTICLE 335 (which mandates 'maintenance of efficiency of administration' while considering SCs/STs in services). The SC's 50% ceiling and creamy layer doctrine flow from this efficiency-reservation balance ✓.
• Statement-II WRONG — Article 335 of the Constitution DOES NOT DEFINE the term 'efficiency of administration.' It merely uses the phrase ('maintenance of efficiency of administration') without defining what constitutes efficiency. Definitions have come through judicial interpretation, NOT the constitutional text itself. Classic constitutional-vs-judicial source confusion.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — INDIA HAS URANIUM DEPOSITS (in Andhra Pradesh's Tummalapalle, Jharkhand's Jaduguda, Meghalaya, etc.) but DEPENDS ON COAL FOR MOST OF ITS ELECTRICITY PRODUCTION (~52% of installed capacity from coal-based thermal plants; ~70%+ of generation). India's nuclear share is only ~3% ✓.
• Statement-II WRONG — Uranium NEED NOT BE ENRICHED TO 60% for electricity production. India's PRESSURIZED HEAVY WATER REACTORS (PHWRs) use NATURAL UNENRICHED URANIUM (0.7% U-235 content). LIGHT WATER REACTORS use LOW-ENRICHED URANIUM (3-5% U-235). Only WEAPONS-GRADE URANIUM requires >90% enrichment. The 60% claim is fabricated and reflects no real reactor type. Classic technical-fabrication.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — MARSUPIALS (pouched mammals — kangaroos, wallabies, koalas, opossums) are NOT NATURALLY FOUND IN INDIA. They are largely confined to AUSTRALIA (90% of species), New Guinea, and the Americas (opossums) due to biogeographic isolation post-Gondwana breakup ✓.
• Statement-II WRONG — MARSUPIALS DO NOT 'thrive only in montane grasslands with no predators.' They thrive in DIVERSE HABITATS — rainforests (Australian tree kangaroos), arid deserts (red kangaroos), woodlands, grasslands, and even urban areas. They COEXIST WITH PREDATORS (dingoes in Australia, eagles, snakes). The S2 habitat-restriction is fabricated.

Answer (a): The International Union for Conservation of Nature. The INVASIVE SPECIES SPECIALIST GROUP (ISSG) — which develops the GLOBAL INVASIVE SPECIES DATABASE (GISD) — is part of the INTERNATIONAL UNION FOR CONSERVATION OF NATURE (IUCN), specifically a sub-component of IUCN's SPECIES SURVIVAL COMMISSION (SSC). ISSG is a global network of scientific and policy experts on invasive species; works to reduce threats to natural ecosystems and species threatened with extinction by invasive aliens. Major focus areas include 'World's 100 Worst Invasive Alien Species.'

• (b) UNEP — broader environmental UN body, not invasive species specific.
• (c) UN World Commission on Environment and Development — Brundtland Commission (1987 'Our Common Future' report); not species-focused.
• (d) WWF — independent NGO, not host of ISSG.

Answer (b): Only two. Nocturnal/crepuscular activity:

• 1. LION-TAILED MACAQUE (Macaca silenus, endemic to Western Ghats) — DIURNAL primate, active during the day. NOT nocturnal.
• 2. MALABAR CIVET (Viverra civettina, critically endangered) — NOCTURNAL, active after sunset. ✓
• 3. SAMBAR DEER (Rusa unicolor) — primarily NOCTURNAL/CREPUSCULAR (active at dusk and dawn, with significant night activity), grazing more at night to avoid predators. ✓

Two nocturnal: Malabar Civet + Sambar Deer.

Answer (c): Honeybees. HONEYBEES (Apis mellifera and other Apis species) PERFORM the FAMOUS 'WAGGLE DANCE' to communicate with their hive-mates. The dance encodes:

• DIRECTION to the food source — relative to the sun's position.
• DISTANCE — encoded by the duration of the waggle phase.
• Decoded by ETHOLOGIST KARL VON FRISCH — won the NOBEL PRIZE IN PHYSIOLOGY/MEDICINE 1973 for this discovery.

This is a sophisticated case of symbolic, abstract communication in non-human animals. The dance is performed in figure-eight pattern; faster = closer; slower = farther.

• (a) Butterflies — no dance communication.
• (b) Dragonflies — visual signaling, not waggle dance.
• (d) Wasps — communicate via pheromones, not waggle dance.

Answer (d): All four.

• S1 CORRECT — Many MUSHROOMS HAVE MEDICINAL PROPERTIES — Reishi (Ganoderma lucidum), Lion's Mane (Hericium erinaceus), Cordyceps, Turkey Tail, Maitake. Used in traditional medicine for immune support, anticancer (β-glucans), neuroprotection ✓.
• S2 CORRECT — Some mushrooms have PSYCHOACTIVE PROPERTIES — Psilocybe species ('magic mushrooms') contain psilocybin/psilocin, which produce hallucinations. Active research for treating depression, PTSD ✓.
• S3 CORRECT — Some mushrooms have INSECTICIDAL PROPERTIES — entomopathogenic fungi like Beauveria bassiana, Metarhizium anisopliae infect and kill insects (used as biopesticides). ✓
• S4 CORRECT — Some mushrooms have BIOLUMINESCENT PROPERTIES — over 80 species emit foxfire glow (e.g., Mycena chlorophos, Omphalotus olearius, Panellus stipticus) due to luciferin-luciferase reaction. ✓

All four properties are well-documented.

Answer (c): All three. Note: Per UPSC's official answer, all three statements are marked correct, though some scholars dispute S1.

• S1 (per UPSC key) CORRECT — Some Indian squirrels (e.g., Indian palm squirrel, Funambulus species) DO BUILD NESTS in tree hollows AND in burrows in the ground (especially during the breeding season). Most squirrels are arboreal but ground-burrowing behaviour is documented for some species ✓.
• S2 CORRECT — INDIAN SQUIRRELS STORE THEIR FOOD MATERIALS LIKE NUTS AND SEEDS in the ground (caching/scatter-hoarding behaviour) — important for forest regeneration as cached seeds often germinate ✓.
• S3 CORRECT — INDIAN SQUIRRELS ARE OMNIVOROUS — eat nuts, seeds, fruits, leaves, AND insects, eggs, small invertebrates. Diet is varied beyond pure plant matter ✓.

Answer (c): All three. EXTREMOPHILES — microorganisms thriving in conditions hostile to most life:

• S1 CORRECT — Some microorganisms (HYPERTHERMOPHILES) GROW IN ENVIRONMENTS WITH TEMPERATURES ABOVE 100°C (boiling point of water). Pyrolobus fumarii thrives at 113°C; Methanopyrus kandleri at 122°C in hydrothermal vents. ✓
• S2 CORRECT — Some microorganisms (PSYCHROPHILES) GROW BELOW THE FREEZING POINT — Polaromonas vacuolata grows at -2°C; some bacteria active at -20°C in Antarctic ice. ✓
• S3 CORRECT — Some microorganisms (ACIDOPHILES) GROW IN HIGHLY ACIDIC ENVIRONMENTS WITH pH BELOW 3 — Picrophilus oshimae grows at pH 0; Acidithiobacillus thrives in mine drainage at pH 2. ✓

Life adaptability spans extreme temperatures, pH, salinity (halophiles), pressure (piezophiles), radiation (radioresistant).

Answer (b): Orangutan. ORANGUTANS (Pongo pygmaeus, P. abelii, P. tapanuliensis) — great apes of Borneo and Sumatra — are KNOWN TOOL-MAKERS. They:

• MAKE TOOLS WITH STICKS to SCRAPE INSECTS (termites, ants) FROM HOLES IN TREES OR LOGS.
• Use stick tools to extract honey from beehives and seeds from fruit.
• Use leaves as 'umbrellas' against rain.
• Show cultural transmission — different orangutan groups have different tool-using traditions.

Tool use is also documented in chimpanzees, capuchin monkeys, and crows. Among the listed options:

• (a) Fishing cat — uses paws to catch fish; doesn't make tools.
• (c) Otter — uses stones to crack shellfish (sea otters specifically) but doesn't make stick tools for insects.
• (d) Sloth Bear — uses extended snout/long tongue for termites; doesn't fashion tools.

Answer (d): All four. HYDROFLUOROCARBONS (HFCs) — synthetic fluorinated compounds used as replacements for ozone-depleting CFCs/HCFCs (under Montreal Protocol). HFCs have ZERO ODP but HIGH GLOBAL WARMING POTENTIAL. Their applications include:

• 1. AEROSOLS ✓ — propellants in aerosol sprays (replacing CFCs).
• 2. FOAM AGENTS ✓ — blowing agents for polyurethane and polystyrene foam.
• 3. FIRE RETARDANTS ✓ — fire suppression agents (replacing halons).
• 4. LUBRICANTS ✓ — synthetic refrigeration lubricants (esp. in HVAC compressors).

All four applications are well-documented. The KIGALI AMENDMENT (2016) to the Montreal Protocol commits countries to phase down HFC use to mitigate climate impact (HFCs have GWP 100-12,000x CO2).

Answer (b): Only two.

• S1 CORRECT — JHELUM RIVER (Vitasta) PASSES THROUGH WULAR LAKE in Kashmir Valley — Wular is the LARGEST FRESHWATER LAKE IN INDIA, formed by tectonic activity, fed by Jhelum which both enters and exits the lake. Ramsar site since 1990. ✓
• S2 WRONG — KRISHNA RIVER DOES NOT DIRECTLY FEED KOLLERU LAKE. Kolleru Lake (in Andhra Pradesh) is fed by the BUDAMERU and TAMMILERU rivers (and floodwaters from the Krishna and Godavari deltas via canals/channels indirectly), NOT the Krishna directly. Kolleru is between the Krishna and Godavari deltas. Classic 'directly feeds' fabrication.
• S3 CORRECT — KANWAR LAKE (Kabar Tal) is in BEGUSARAI DISTRICT, BIHAR — formed by the MEANDERING/OXBOW activity of the GANDAK RIVER, an important lake formed by the river's natural meandering. Designated Ramsar site (2020) ✓.

Answer (b): Only two pairs.

• Pair 1 CORRECT — KAMARAJAR PORT (formerly Ennore Port) in Tamil Nadu was the FIRST MAJOR PORT IN INDIA REGISTERED AS A COMPANY (under the Companies Act, 2013) — incorporated as 'Kamarajar Port Ltd' in 1999. Departure from the trust-port model ✓.
• Pair 2 CORRECT — MUNDRA PORT (in Gujarat, Adani Group) is the LARGEST PRIVATELY-OWNED PORT IN INDIA — handles 250+ MMT cargo annually; strategically located on the Gulf of Kachchh near west-Asia trade routes ✓.
• Pair 3 WRONG — VISHAKHAPATNAM PORT is NOT THE LARGEST CONTAINER PORT IN INDIA. The LARGEST CONTAINER PORT in India is JAWAHARLAL NEHRU PORT (JNPT/Nhava Sheva, Mumbai-Maharashtra), handling ~5 million TEUs annually. Vishakhapatnam is a major port but mainly handles bulk cargo (iron ore, coal). Classic ranking-misattribution.

Answer (b): Only two.

• S1 WRONG — JACKFRUIT (Artocarpus heterophyllus) is an EVERGREEN TREE — retains foliage year-round in tropical climates. NOT deciduous.
• S2 CORRECT — MAHUA (Madhuca indica) is a DECIDUOUS TREE — sheds leaves in winter/dry season; spring flowering is a major event in tribal economies (mahua liquor, oilseed) ✓.
• S3 CORRECT — TEAK (Tectona grandis) is a DECIDUOUS TREE — sheds leaves in dry season (December-January); native to Indian dry deciduous forests ✓.

Mahua + Teak are deciduous; Jackfruit is evergreen.

Answer (b): Only two.

• S1 CORRECT — INDIA HAS MORE ARABLE LAND AREA THAN CHINA — India has ~157 million hectares of arable land vs China's ~135 million hectares. Despite India's smaller geographical area, more land is suitable for cultivation due to fertile alluvial plains ✓.
• S2 WRONG — The PROPORTION OF IRRIGATED AREA IS HIGHER IN CHINA than India — China has ~68% irrigated area; India ~50%. Massive Chinese investments in irrigation infrastructure (canals, tube wells) explain this difference. Direction inverted.
• S3 WRONG — AVERAGE PRODUCTIVITY PER HECTARE IS HIGHER IN CHINA than India — China's grain yields (~6 tonnes/ha rice; ~5 tonnes/ha wheat) far exceed India's (~3.5 tonnes/ha rice; ~3 tonnes/ha wheat). Better irrigation, mechanization, fertilizer use, infrastructure. Direction inverted.

Answer (d): Rann of Kutch. The RANN OF KUTCH (in Gujarat, between the Gulf of Kachchh and the Indus delta) is the BEST EXAMPLE of REPEATED FALLS IN SEA LEVEL giving rise to PRESENT-DAY EXTENSIVE MARSHLAND.

• Geological history: Originally a SHALLOW SEA / GULF OF THE ARABIAN SEA in the Pleistocene (Quaternary).
• REPEATED SEA-LEVEL CHANGES + tectonic uplift (Kachchh region rises ~1 mm/year) gradually emerged the seabed.
• Today: a SALT MARSH (Greater Rann + Little Rann) — ~30,000 sq km of seasonally inundated salt-encrusted flat. World's largest salt desert.
• Famous for the wild ass (Khur) sanctuary, flamingo breeding, Lakhpat fort.
• (a) Bhitarkanika Mangroves — Odisha estuary, NOT marshland from sea-level fall.
• (b) Marakkanam Salt Pans — TN coast, artificial salt extraction not the geomorphological feature.
• (c) Naupada Swamp — Andhra coastal swamp, smaller scale.

Answer (d): Titanium. ILMENITE (FeTiO3) and RUTILE (TiO2) are MAJOR TITANIUM ORES, abundantly available in COASTAL BEACH SANDS along the Indian coast — KERALA (Manavalakurichi/Quilon), TAMIL NADU (Kollam Trivandrum coast), ODISHA (Chhatrapur), Andhra Pradesh, Maharashtra (Ratnagiri).

• These minerals occur as PLACER DEPOSITS in coastal/marine sands, formed by erosion of igneous/metamorphic rocks and concentration by wave action.
• TITANIUM is critical for: aerospace alloys, military components, white pigment (TiO2 in paints), surgical implants (titanium alloy biocompatibility), corrosion-resistant materials.
• Indian Rare Earths Limited (IREL) is the major government processor.
• (a) Aluminium — from bauxite, NOT ilmenite/rutile.
• (b) Copper — from chalcopyrite, NOT these minerals.
• (c) Iron — present in ilmenite (FeO component) but the primary economic value is TITANIUM extraction.

Answer (c): the Democratic Republic of the Congo. The DEMOCRATIC REPUBLIC OF THE CONGO (DRC) PRODUCES ABOUT THREE-FOURTHS (~70-75%) OF THE WORLD'S COBALT — the metal critical for manufacturing LITHIUM-ION BATTERIES used in ELECTRIC VEHICLES (EVs), portable electronics, and grid storage.

• Major Cobalt belt: Katanga (Lualaba and Haut-Katanga provinces) — copper-cobalt sulfide ores.
• Often mined as a BY-PRODUCT of copper mining; significant artisanal/informal mining (with child labour concerns).
• Critical mineral for the global energy transition; subject of intense geopolitical competition (Chinese investment, US/EU push for diversification).
• (a) Argentina — major LITHIUM producer (Lithium Triangle), not cobalt.
• (b) Botswana — diamonds, not cobalt.
• (d) Kazakhstan — uranium, oil, coal, not cobalt.

Answer (a): Cameroon. The CONGO BASIN spans CENTRAL AFRICA — comprising the world's second-largest tropical rainforest (after the Amazon). The basin straddles SIX COUNTRIES:

• Cameroon ✓
• Central African Republic
• Democratic Republic of Congo (largest portion)
• Republic of Congo
• Equatorial Guinea
• Gabon

CAMEROON contains the northern/western edge of the Congo Basin's rainforest — the southwestern parts of Cameroon (East Region) drain into the Congo system via the Sangha River.

• (b) NIGERIA — drains through the Niger River (NIGER BASIN), NOT Congo Basin.
• (c) SOUTH SUDAN — drains via the WHITE NILE (NILE BASIN), NOT Congo.
• (d) UGANDA — drains via the WHITE NILE (NILE BASIN), NOT Congo.

Answer (d): None.

• S1 WRONG — AMARKANTAK HILLS are at the CONFLUENCE OF VINDHYA AND SATPURA RANGES (in Madhya Pradesh, source of Narmada and Son rivers), NOT 'Vindhya and Sahyadri' (which are very distant; Sahyadri = Western Ghats in Maharashtra-Kerala). Classic range misattribution.
• S2 WRONG — BILIGIRIRANGAN HILLS (BR Hills) are in KARNATAKA, connecting the WESTERN GHATS AND EASTERN GHATS — NOT 'easternmost part of Satpura Range.' Satpuras are in Central India (MP-Maharashtra). Classic range-region misplacement.
• S3 WRONG — SESHACHALAM HILLS are in Andhra Pradesh — they are part of the EASTERN GHATS (forming the Tirumala/Tirupati region), NOT 'southernmost part of Western Ghats.' Western Ghats end further south near Kanyakumari/Agasthyamala. Classic east-west-Ghats confusion.

All three statements misplace the hill ranges — answer is 'None'.

Answer (d): None.

• S1 WRONG — The EAST-WEST CORRIDOR (under the National Highways Development Project / NHDP-2) connects SILCHAR (Assam) to PORBANDAR (Gujarat), NOT 'Dibrugarh to Surat.' Length ~3,300 km. Classic city-misattribution.
• S2 WRONG — The TRILATERAL HIGHWAY (India-Myanmar-Thailand) connects MOREH (Manipur) to MAE SOT (Thailand) via Yangon, BAGAN, Tamu — NOT 'Chiang Mai.' Chiang Mai is in northern Thailand, not on this route. Classic Thai-city misplacement.
• S3 WRONG — The BANGLADESH-CHINA-INDIA-MYANMAR (BCIM) ECONOMIC CORRIDOR connects KUNMING (China) WITH KOLKATA (India) via Mandalay (Myanmar) and Dhaka (Bangladesh) — NOT 'Varanasi.' Classic Indian-city misplacement.

Answer (d): Statement-I incorrect but Statement-II is correct.

• Statement-I WRONG — InvITs (Infrastructure Investment Trusts) are SEBI-regulated pooled investment vehicles. Per Income Tax Act provisions: INTEREST INCOME from InvITs distributed to investors IS TAXABLE in the hands of investors (often, though some interest from special purpose vehicles to InvIT can have favorable treatment). DIVIDENDS from InvITs may also be taxable depending on whether the underlying SPV opted for the new corporate tax regime. The S1 'interest tax-exempted but dividend taxable' claim is reversed/fabricated.
• Statement-II CORRECT — InvITs ARE RECOGNISED AS BORROWERS UNDER THE 'SECURITIZATION AND RECONSTRUCTION OF FINANCIAL ASSETS AND ENFORCEMENT OF SECURITY INTEREST ACT, 2002' (SARFAESI ACT). Amendment in 2016 added InvITs as eligible borrowers under SARFAESI ✓. This enables banks to invoke SARFAESI provisions against InvITs for default recovery.

Answer (a): Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I.

• Statement-I CORRECT — IN THE POST-PANDEMIC RECENT PAST (2022-23), MANY CENTRAL BANKS WORLDWIDE HAVE CARRIED OUT INTEREST RATE HIKES — US Fed (75 bps × 4), ECB, Bank of England, RBI, etc. — to combat post-COVID inflation surge ✓.
• Statement-II CORRECT — CENTRAL BANKS GENERALLY ASSUME THEY HAVE THE ABILITY TO COUNTERACT RISING CONSUMER PRICES VIA MONETARY POLICY MEANS (mainly interest rate adjustments). This is a foundational tenet of modern central banking — that demand-side inflation can be controlled by raising rates (slowing aggregate demand) ✓.
• Statement-II IS THE CORRECT EXPLANATION FOR Statement-I — central banks raised rates BECAUSE they assume monetary tools can counter inflation. The cause-effect logic is direct ✓.

Answer (b): Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I.

• Statement-I CORRECT — CARBON MARKETS (cap-and-trade, voluntary carbon credits) ARE LIKELY TO BE ONE OF THE MOST WIDESPREAD TOOLS IN THE FIGHT AGAINST CLIMATE CHANGE. EU ETS, China ETS, REDD+, India's carbon credit framework are major examples ✓.
• Statement-II CORRECT (per UPSC's controversial reading) — The official key marks Statement-II as correct: 'Carbon markets transfer resources from the private sector to the State' — though some experts disagree (carbon markets primarily transfer resources between PRIVATE participants, not from private to state directly; states get auction revenue from emission allowances). UPSC's interpretation: carbon allowances issued by state, traded by private; state gains. ✓ (per official key)
• HOWEVER, Statement-II is NOT THE CORRECT EXPLANATION FOR Statement-I — carbon markets being widespread climate tools is not BECAUSE they transfer resources from private to state; rather, it's because they internalize the cost of emissions. The two statements are independent.

Answer (a): Conducting 'Open Market Operations'. 'STERILIZATION' refers to RBI'S ACTION TO NEUTRALIZE THE LIQUIDITY IMPACT OF FOREX INTERVENTIONS or other capital flows — to keep MONEY SUPPLY UNCHANGED while managing the exchange rate. Mechanism:

• When RBI BUYS DOLLARS (to prevent rupee appreciation from large foreign inflows), it RELEASES RUPEES into the system → INCREASES MONEY SUPPLY.
• To STERILIZE this excess liquidity (prevent inflation), RBI SELLS GOVERNMENT SECURITIES via OPEN MARKET OPERATIONS (OMOs) → ABSORBS RUPEES BACK from the system.
• Net effect: forex bought, money supply unchanged → 'sterilized.'
• Other tools: Market Stabilisation Scheme (MSS), CRR adjustments — also used.
• (b) Settlement/payment systems oversight — different RBI function.
• (c) Government debt management — different function.
• (d) NBFI regulation — different function.

Answer (b): Only two. Financial markets — divided into MONEY MARKET (short-term, < 1 year) and CAPITAL MARKET (medium/long-term, > 1 year):

• 1. GOVERNMENT BOND MARKET ✓ — TRADES LONG-TERM SECURITIES (G-Secs of 5-30 years maturity) → CAPITAL MARKET.
• 2. CALL MONEY MARKET ✗ — overnight to 14-day inter-bank lending → MONEY MARKET (short-term).
• 3. TREASURY BILL MARKET ✗ — T-Bills of 91, 182, 364 days maturity → MONEY MARKET (short-term).
• 4. STOCK MARKET ✓ — Equities (perpetual capital instruments) → CAPITAL MARKET.

Capital markets: 1 + 4 (G-Sec long bonds + Stocks). Two only.

Answer (b): Many marginal farmers in an area organize themselves into groups and synchronize and harmonize selected agricultural operations. The 'SMALL FARMER LARGE FIELD' (SFLF) concept describes a SCALE-AGGREGATION MODEL where MANY MARGINAL/SMALL FARMERS in an area ORGANIZE THEMSELVES INTO GROUPS and SYNCHRONIZE/HARMONIZE SELECT AGRICULTURAL OPERATIONS (sowing dates, varieties, harvest timing, post-harvest aggregation). Benefits:

• Achieves economies of scale in inputs, machinery, marketing.
• Each farmer retains LAND OWNERSHIP and INDIVIDUAL CULTIVATION RIGHTS — only operations are synchronized.
• Reduces production cost; bulk procurement; better bargaining with traders.
• Pioneered as model for fragmented Indian agriculture.
• (a) Refugee resettlement — different (collective farming concept).
• (c) Land surrender to corporates — different (contract farming).
• (d) Loan-input contract farming — different (corporate-led contract).

Answer (c): All three.

• S1 CORRECT — The GOVERNMENT OF INDIA PROVIDES MINIMUM SUPPORT PRICE (MSP) FOR NIGER (GUIZOTIA ABYSSINICA) SEEDS — under the MSP regime for oilseeds. Niger is one of the 22 mandated MSP crops ✓.
• S2 CORRECT — NIGER IS CULTIVATED AS A KHARIF CROP (sown June-July, harvested October-December) — primarily by tribal farmers in eastern Indian highlands (MP, Odisha, Maharashtra, AP, Karnataka, Bihar, Jharkhand, Chhattisgarh, Gujarat) ✓.
• S3 CORRECT — NIGER SEED OIL IS USED FOR COOKING by SOME TRIBAL POPULATIONS in India — particularly in Madhya Pradesh, Odisha, Andhra Pradesh, Karnataka. Also used as bird feed (especially Goldfinch). ✓

Answer (c): Only three. Intangible assets vs tangible:

• 1. BRAND RECOGNITION ✓ — INTANGIBLE asset (no physical form, but valuable through customer recognition; goodwill).
• 2. INVENTORY ✗ — TANGIBLE asset (physical goods on shelf).
• 3. INTELLECTUAL PROPERTY ✓ — INTANGIBLE asset (patents, trademarks, copyrights, trade secrets).
• 4. MAILING LIST OF CLIENTS ✓ — INTANGIBLE asset (customer database, marketing asset; can be valued, transferred).

Intangibles: 1, 3, 4 (Brand, IP, Mailing List). Tangible: 2 (Inventory). Three intangible.

Answer (b): Only three. The FIFTEENTH FINANCE COMMISSION (15th FC, 2020-2025) used SIX CRITERIA for HORIZONTAL TAX DEVOLUTION — distributing taxes from Centre to States. Apart from POPULATION (15%), AREA (15%), and INCOME DISTANCE (45%) [which are explicitly excluded in the Q]:

• 1. DEMOGRAPHIC PERFORMANCE ✓ (12.5% weight) — based on Total Fertility Rate (rewards fertility decline).
• 2. FOREST AND ECOLOGY ✓ (10% weight) — share of dense forest in state's geographical area.
• 3. GOVERNANCE REFORMS ✗ — NOT a 15th FC criterion (this was part of 14th FC for grants but not formula).
• 4. STABLE GOVERNMENT ✗ — NOT a 15th FC criterion (no political stability factor).
• 5. TAX AND FISCAL EFFORTS ✓ (2.5% weight) — rewards states' own tax-collection efforts (last 3 years average, normalized).

Three criteria from list (1, 2, 5). Answer: Only three.

Answer (c): Only three. The UNOPS SUSTAINABLE INVESTMENTS IN INFRASTRUCTURE AND INNOVATION (S3i) INITIATIVE focuses on THREE infrastructure sectors:

• 1. AFFORDABLE HOUSING ✓ — addressing housing deficits.
• 2. MASS RAPID TRANSPORT ✗ — NOT a primary S3i focus area.
• 3. HEALTH CARE ✓ — health infrastructure.
• 4. RENEWABLE ENERGY ✓ — clean energy infrastructure.

Three sectors: Affordable housing, Health care, Renewable energy. UNOPS (United Nations Office for Project Services) launched S3i in 2018 to mobilize private capital for SDG-aligned infrastructure investment in developing countries.

Answer (b): Only two.

• S1 WRONG — HOME GUARDS are RAISED UNDER STATE-SPECIFIC HOME GUARDS ACTS (and the corresponding state rules), NOT 'Home Guards Act and Rules of the Central Government.' Each state has its own Home Guards Act (e.g., Bombay Home Guards Act 1947, etc.). The Centre provides only guidelines; raising/managing is a State subject. Classic Centre-State authority manipulation.
• S2 CORRECT — The ROLE OF HOME GUARDS is to SERVE AS AN AUXILIARY FORCE TO THE POLICE in maintenance of internal security, public order, and during emergencies/disasters ✓.
• S3 CORRECT — To PREVENT INFILTRATION on the INTERNATIONAL BORDER / COASTAL AREAS, the BORDER WING HOME GUARDS BATTALIONS HAVE BEEN RAISED in some States — Punjab, Rajasthan, Gujarat, Assam, Meghalaya, Tripura, West Bengal — under MHA's broader internal security framework ✓.

Answer (b): Only two.

• Pair 1 CORRECT — UNAUTHORIZED WEARING OF POLICE OR MILITARY UNIFORMS is covered under THE OFFICIAL SECRETS ACT, 1923 (Section 4 — wrongful use of uniform with intent to deceive) ✓.
• Pair 2 WRONG — KNOWINGLY MISLEADING OR OTHERWISE INTERFERING WITH A POLICE OFFICER OR MILITARY OFFICER is covered under the INDIAN PENAL CODE (IPC) — specifically Section 186 (obstructing public servant) and other offences — NOT the INDIAN EVIDENCE ACT, 1872. The Indian Evidence Act deals with rules of evidence in courts. Classic act-misattribution.
• Pair 3 CORRECT — CELEBRATORY GUNFIRE that endangers personal safety is covered under THE ARMS (AMENDMENT) ACT, 2019 (Section 25(1B)(d) added by 2019 amendment, punishable with up to 2 years' imprisonment) ✓.

Two correct pairs (1, 3). Answer (b).

Answer (d): None.

• Pair 1 WRONG — NORTH KIVU AND ITURI are PROVINCES IN EASTERN DEMOCRATIC REPUBLIC OF CONGO (DRC), in news for ARMED CONFLICTS WITH M23 REBELS, ETHNIC VIOLENCE, AND HUMANITARIAN CRISIS — NOT 'War between Armenia and Azerbaijan.' Classic conflict-region misattribution.
• Pair 2 WRONG — NAGORNO-KARABAKH is a DISPUTED REGION BETWEEN ARMENIA AND AZERBAIJAN (in the Caucasus), in news for the 2020 and 2023 wars between these countries (Azerbaijan retook the region in 2023) — NOT 'Insurgency in Mozambique' (which is Cabo Delgado). Classic conflict misattribution.
• Pair 3 WRONG — KHERSON AND ZAPORIZHZHYA are SOUTHERN UKRAINIAN REGIONS, in news for the RUSSO-UKRAINIAN WAR (since Feb 2022) — NOT 'Israel-Lebanon dispute.' Classic conflict misattribution.

All three pairs misplace conflicts; answer is 'None.'

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — ISRAEL HAS ESTABLISHED DIPLOMATIC RELATIONS WITH SOME ARAB STATES — under the ABRAHAM ACCORDS (2020-21): UAE, BAHRAIN, MOROCCO, SUDAN. Earlier: Egypt (1979), Jordan (1994). Recent normalization is a major Middle East diplomatic shift ✓.
• Statement-II WRONG — The 'ARAB PEACE INITIATIVE' was an ARAB LEAGUE-MEDIATED proposal in 2002 (originated by Saudi Crown Prince Abdullah, adopted by the Arab League at Beirut Summit). It was NEVER 'signed by Israel and Arab League.' Israel has NOT formally signed/adopted the Arab Peace Initiative; it remains a unilateral Arab League proposal. Classic agreement-fabrication.

Answer (b): Only two.

• Pair 1 CORRECT — MAJOR DHYAN CHAND KHEL RATNA AWARD is INDIA'S HIGHEST SPORTING HONOR — for the MOST SPECTACULAR AND OUTSTANDING PERFORMANCE BY A SPORTSPERSON OVER A PERIOD OF LAST FOUR YEARS (renamed from Rajiv Gandhi Khel Ratna in 2021) ✓.
• Pair 2 WRONG — ARJUNA AWARD is for OUTSTANDING PERFORMANCE OVER A PERIOD OF LAST FOUR YEARS PLUS LIFETIME COMMITMENT — but the description in the question 'For the lifetime achievement by a sportsperson' is misleading. Specifically, lifetime achievement is the DRONACHARYA AWARD's SUB-CATEGORY for coaches; for sportspersons it's the DHYAN CHAND AWARD (separate from Khel Ratna). Arjuna is for outstanding performance in last 4 years AND lifetime contribution overall. Classic award-description manipulation.
• Pair 3 CORRECT — DRONACHARYA AWARD HONOURS EMINENT COACHES who have successfully trained sports persons or teams (Padma-equivalent for coaches) ✓.
• Pair 4 WRONG — RASHTRIYA KHEL PROTSAHAN PURASKAR is given to CORPORATE ENTITIES (PSUs, private), individuals, and NGOs that have CONTRIBUTED TO SPORTS PROMOTION/DEVELOPMENT — NOT to sportspersons after retirement. The 'Maulana Abul Kalam Azad Trophy' or Dhyan Chand Award (for lifetime achievement) cover that distinct purpose. Classic award-purpose manipulation.

Two correct pairs (1, 3). Answer (b).

Answer (b): Only two.

• S1 CORRECT — The 44th CHESS OLYMPIAD 2022 WAS HELD IN INDIA (Mahabalipuram-Chennai, July 28-Aug 9, 2022) — THE FIRST TIME the Chess Olympiad was hosted in India in its 95-year history ✓.
• S2 CORRECT — The OFFICIAL MASCOT was named 'THAMBI' (Tamil for 'younger brother') — depicting a knight chess piece ✓.
• S3 WRONG — The TROPHY for the WINNING TEAM IN THE OPEN SECTION (men/mixed) is the HAMILTON-RUSSELL CUP (named after British MP Frederick Hamilton-Russell). The VERA MENCHIK CUP is for the WOMEN'S section (named after the first women's world chess champion). The S3 attributes the open-section trophy to Vera Menchik incorrectly — classic trophy-section swap.
• S4 WRONG — The TROPHY for the WOMEN'S SECTION is the VERA MENCHIK CUP (NOT Hamilton-Russell). The two trophies are exchanged between the genders in the question. Classic trophy-section swap.

Answer (d): None.

• Pair 1 WRONG — DONBAS is a region of EASTERN UKRAINE (Donetsk-Luhansk industrial region), in news for the 2022-23 RUSSO-UKRAINIAN WAR — NOT 'Syria.' Classic country-misplacement.
• Pair 2 WRONG — KACHIN is a region of NORTHERN MYANMAR (Kachin State), in news for ETHNIC INSURGENCY (Kachin Independence Army) and Myanmar civil war post-2021 coup — NOT 'Ethiopia.' Classic country-misplacement.
• Pair 3 WRONG — TIGRAY is a region of NORTHERN ETHIOPIA, in news for the 2020-2022 TIGRAY WAR (Ethiopian government vs Tigray People's Liberation Front) — NOT 'North Yemen' (which is generally referred to as just 'Yemen' or specifically the Houthi-controlled north of Yemen). Classic country-misplacement.

All three conflict-zone country pairings are misplaced; answer is 'None.'

Answer (d): Successful coups. In recent years, CHAD, GUINEA, MALI, AND SUDAN ALL EXPERIENCED SUCCESSFUL MILITARY COUPS — collectively forming part of the 'AFRICAN COUP BELT' (Sahel region):

• MALI — coups in August 2020 and May 2021 (Col. Assimi Goïta led both).
• CHAD — President Idriss Déby died in April 2021; military council under his son took control (effectively a coup).
• GUINEA — September 2021 coup by Col. Mamady Doumbouya.
• SUDAN — October 2021 coup by Gen. Abdel Fattah al-Burhan.

This 'coup belt' represents a wave of democratic backsliding and military takeovers in West/Central Africa (also Burkina Faso 2022 ×2, Niger 2023, Gabon 2023). Common factors: economic stagnation, jihadist insurgencies, distrust of post-colonial elites.

• (a) Rare earth deposits — wrong (not the common factor).
• (b) Chinese military bases — wrong (only Djibouti has Chinese base).
• (c) Sahara expansion — wrong (geographical, not the common political event).

Answer (c): All three. GREEN HYDROGEN (produced by electrolysis of water using renewable energy) is expected to play a SIGNIFICANT ROLE IN DECARBONIZING all three HEAVY/HARD-TO-ABATE INDUSTRIES:

• 1. FERTILIZER PLANTS ✓ — Green hydrogen replaces grey hydrogen (from natural gas) in AMMONIA SYNTHESIS (Haber-Bosch process). India's National Green Hydrogen Mission targets fertilizer industry decarbonization.
• 2. OIL REFINERIES ✓ — Hydrogen used in HYDROCRACKING and HYDRO-DESULFURIZATION processes; replacing grey hydrogen with green hydrogen reduces refinery emissions.
• 3. STEEL PLANTS ✓ — Direct Reduced Iron (DRI) using GREEN HYDROGEN AS REDUCTANT replaces coal-based blast furnace operations; pivotal for steel industry decarbonization. Tata, JSW, ArcelorMittal pursuing this.

Answer (c): Both 1 and 2.

• S1 CORRECT — The G-20 GROUP WAS ORIGINALLY ESTABLISHED IN 1999 AS A PLATFORM FOR FINANCE MINISTERS AND CENTRAL BANK GOVERNORS to discuss international economic and financial issues — in response to Asian Financial Crisis 1997. It was elevated to LEADERS' SUMMIT level in 2008 (Washington) post-Global Financial Crisis ✓.
• S2 CORRECT — DIGITAL PUBLIC INFRASTRUCTURE (DPI) IS ONE OF INDIA'S G-20 PRIORITIES (during India's 2022-23 Presidency) — based on India's Aadhaar/UPI/DigiLocker stack, India promoted DPI as a global development tool. Outcome: G20 endorsed DPI framework at Delhi Summit (Sept 2023) ✓.

Answer (a): archaeological excavations. ALEXANDER REA (1858-1924), A.H. LONGHURST, ROBERT SEWELL (1845-1925), JAMES BURGESS (1832-1916), and WALTER ELLIOT (1803-1887) were all 19th-CENTURY BRITISH ARCHAEOLOGISTS, EPIGRAPHISTS, AND HISTORIANS who worked on ARCHAEOLOGICAL EXCAVATIONS in colonial India:

• ALEXANDER REA — Director of the ARCHAEOLOGICAL SURVEY of South India; excavated Adichanallur (TN), Pallava sites, Buddhist sites in Andhra (Salihundam, etc.).
• A.H. LONGHURST — Excavated Buddhist sites in Andhra Pradesh (Jaggayyapeta, Nagarjunakonda); ASI Madras circle.
• ROBERT SEWELL — Author of 'A Forgotten Empire' (Vijayanagara research, 1900); pioneered Vijayanagara historiography.
• JAMES BURGESS — Archaeological Surveyor of Western India; founded the 'Indian Antiquary' journal; documented Ajanta, Ellora.
• WALTER ELLIOT — Madras Civil Service archaeologist-numismatist; pioneered South Indian numismatics.
• (b-d) — wrong professions for these scholars.

Answer (c): All three. Note: Per UPSC's official key, all three pairs are correctly matched — though some experts note Besnagar's primary association is with Vaishnavism (Heliodorus Pillar to Vasudeva).

• Pair 1 CORRECT (per UPSC official key) — BESNAGAR (in Vidisha, MP) — has multiple ancient remains; while the Heliodorus Pillar reflects Vaishnava (Bhagavata) tradition, there are also SHAIVITE CAVE SHRINES at Besnagar. UPSC accepts ✓.
• Pair 2 CORRECT — BHAJA (in Pune district, Maharashtra) — famous BUDDHIST CAVE SHRINE complex (caves dating to 2nd c BCE), Western Ghats; rock-cut chaityas and viharas. Hinayana Buddhist site ✓.
• Pair 3 CORRECT — SITTANAVASAL (in Pudukkottai district, Tamil Nadu) — JAIN CAVE SHRINE (8-9th c CE Pandya/Pallava era), famous for Jain Tirthankara reliefs and exquisite ceiling fresco paintings ✓.

Answer (a): Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I.

• Statement-I CORRECT — 7TH AUGUST IS DECLARED AS THE NATIONAL HANDLOOM DAY in India — first observed in 2015 by PM Modi at Madras Madras to celebrate handloom industry contributions ✓.
• Statement-II CORRECT — IT WAS ON 7TH AUGUST 1905 THAT THE SWADESHI MOVEMENT WAS LAUNCHED — at the Town Hall, Calcutta, in protest against the Partition of Bengal (announced July 1905, effective Oct 1905). The Boycott Resolution called for swadeshi (indigenous goods) and rejection of British imports — particularly textiles ✓.
• CAUSAL LINK — National Handloom Day was DELIBERATELY CHOSEN on 7th August to COMMEMORATE THE SWADESHI MOVEMENT'S LAUNCH (which centered on Indian handloom textiles vs British mill-made cloth). Statement-II IS THE CORRECT EXPLANATION FOR Statement-I ✓.

Answer (d): Statement-I is incorrect but Statement-II is correct.

• Statement-I WRONG — Per the FLAG CODE OF INDIA, 2002, the standard NATIONAL FLAG SIZES are specified in NINE STANDARD SIZES: from 6300×4200 mm down to 150×100 mm — the listed sizes include 1800×1200, 900×600, 450×300, etc. The 600×400 mm size is NOT among the listed standard sizes per the Flag Code 2002 schedule. Closest is 450×300 mm. Classic specification fabrication.
• Statement-II CORRECT — Per the Flag Code, the RATIO OF THE LENGTH TO THE HEIGHT (WIDTH) OF THE FLAG SHALL BE 3:2 — this is the universal Indian National Flag aspect ratio ✓.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — CONSTITUTION DAY (Samvidhan Divas) IS CELEBRATED ON 26TH NOVEMBER EVERY YEAR — declared in 2015 by Government of India (during Ambedkar's 125th birth anniversary year), to PROMOTE CONSTITUTIONAL VALUES AMONG CITIZENS. 26 November 1949 is when the Constituent Assembly ADOPTED the Constitution ✓.
• Statement-II WRONG — On 26TH NOVEMBER 1949, the Constituent Assembly ADOPTED the Constitution of India (final adoption date). It DID NOT 'set up a Drafting Committee' on this day — the Drafting Committee under Dr. B.R. Ambedkar was ESTABLISHED ON 29 AUGUST 1947 (not 26 November 1949). Classic date-confusion: 29 Aug 1947 = Drafting Committee setup; 26 Nov 1949 = Constitution adoption; 26 Jan 1950 = Constitution implementation/Republic Day.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — SWITZERLAND IS ONE OF THE LEADING EXPORTERS OF GOLD IN TERMS OF VALUE — Switzerland is the world's largest GOLD REFINING HUB (60-70% of world's gold passes through Swiss refineries). Major Swiss refiners: Valcambi, MKS PAMP, Argor-Heraeus, Metalor — refining and re-exporting to global buyers. Switzerland's gold exports make it among top exporters by value ✓.
• Statement-II WRONG — Switzerland DOES NOT have the SECOND LARGEST GOLD RESERVES in the world. The top gold-reserve holders (per IMF/World Gold Council) are: USA (#1, ~8,133 tonnes), GERMANY (#2, ~3,355 tonnes), ITALY (#3), FRANCE (#4), RUSSIA (#5), CHINA (#6). Switzerland is around 7th-8th globally. Classic ranking-fabrication.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — RECENTLY (June 2021), the USA AND THE EU LAUNCHED THE 'TRADE AND TECHNOLOGY COUNCIL' (TTC) at the EU-US Summit. TTC focuses on collaboration on technology standards, climate, supply chains, AI, semiconductors, export controls (esp. Russia/China) ✓.
• Statement-II WRONG — TTC's STATED PURPOSE is to PROMOTE COMMON STANDARDS, COORDINATE TECHNOLOGY POLICIES, COUNTER UNFAIR TRADE PRACTICES (esp. China), and STRENGTHEN TRANSATLANTIC SUPPLY CHAINS — NOT to 'bring technological progress and physical productivity under their control.' The S2 framing as totalitarian-control-of-technology is a fabricated, conspiratorial interpretation. Classic mission-purpose manipulation.

Answer (d): Statement-I is incorrect but Statement-II is correct.

• Statement-I WRONG — INDIA ACCOUNTS FOR ROUGHLY 1.8-2.0% OF GLOBAL GOODS EXPORTS — NOT 3.2%. India's share has been growing (from ~1.7% to ~2%) but remains well below 3.2%. Classic statistic-fabrication.
• Statement-II CORRECT — MANY LOCAL COMPANIES AND SOME FOREIGN COMPANIES OPERATING IN INDIA HAVE TAKEN ADVANTAGE OF INDIA'S 'PRODUCTION-LINKED INCENTIVE (PLI) SCHEME' — launched 2020 across 14 sectors (electronics, pharma, textiles, automobiles, etc.). Companies like Foxconn, Pegatron, Wistron, Apple suppliers, Samsung, etc. have received PLI benefits to manufacture in India ✓.

Answer (a): Only one. The EU STABILITY AND GROWTH PACT (SGP, 1997, entered into force 1999) is a TREATY/SET OF RULES that:

• 1. ✓ LIMITS THE LEVELS OF BUDGETARY DEFICIT of EU member countries — to 3% of GDP for annual deficit and 60% of GDP for total debt (the MAASTRICHT CRITERIA). Member states must follow these fiscal rules; excessive deficit triggers EU disciplinary procedures (Excessive Deficit Procedure). ✓
• 2. ✗ DOES NOT make EU countries 'share their infrastructure facilities' — that's a fabricated function.
• 3. ✗ DOES NOT enable 'sharing technologies' — that's a fabricated function.

Only S1 is correct → 'Only one.' SGP is a fiscal-discipline framework, not infrastructure or tech sharing.

Answer (d): None.

• S1 WRONG — The 'GLOBAL COMPACT FOR SAFE, ORDERLY AND REGULAR MIGRATION' (GCM) was adopted by the UN in December 2018 — but NOT all UN member countries adopted it. Several countries — INCLUDING USA, AUSTRALIA, AUSTRIA, BULGARIA, CHILE, CZECH REPUBLIC, HUNGARY, ISRAEL, LATVIA, POLAND, SLOVAKIA, SWITZERLAND, ITALY — voted against, abstained, or refused to formally endorse. The 'all countries' claim is wrong.
• S2 WRONG — The GCM is NOT LEGALLY BINDING on UN member countries. It is a NON-BINDING INTERGOVERNMENTAL COMPACT (cooperative framework) — countries may opt-out of any provisions. Classic binding-status fabrication.
• S3 WRONG — The GCM addresses INTERNATIONAL MIGRATION ONLY — NOT internal migration or internally displaced persons (IDPs). IDPs fall under separate frameworks (UNHCR Guiding Principles on Internal Displacement). Classic scope-fabrication.

Answer (a): Only two. Ukraine's land borders (with EU member states):

• 1. BULGARIA ✗ — Bulgaria is in Southern Europe, separated from Ukraine by Romania and the Black Sea. NO LAND BORDER.
• 2. CZECH REPUBLIC ✗ — Czech Republic in Central Europe, separated from Ukraine by Slovakia. NO LAND BORDER.
• 3. HUNGARY ✓ — Hungary shares a 130 km LAND BORDER with western Ukraine (Carpathian region). ✓
• 4. LATVIA ✗ — Latvia is in the Baltic states, separated from Ukraine by Belarus and Russia. NO LAND BORDER.
• 5. LITHUANIA ✗ — Baltic states; separated by Belarus from Ukraine. NO LAND BORDER.
• 6. ROMANIA ✓ — Romania shares a 600+ km LAND BORDER with southern Ukraine (Galați region and along the Tisza River). ✓

Two countries: Hungary + Romania. Answer (a). Ukraine's other land neighbours: Belarus, Russia, Moldova, Slovakia, Poland.

Answer (c): Infrared waves are largely absorbed by water vapour concentrated in the lower atmosphere.

• (a) WRONG — INSOLATION at equator vs poles: equator receives ~2.5× more annual insolation than poles, NOT 10×. Earth's tilt distributes insolation by season; the equator-pole gradient is significant but ~2.5×, not an order of magnitude more. Classic numerical-fabrication.
• (b) WRONG — INFRARED RAYS constitute approximately 49-51% of solar radiation reaching Earth, NOT 'two-thirds' (~67%). Incoming solar radiation: visible 41%, infrared 49%, ultraviolet 9%. Classic numerical-fabrication.
• (c) CORRECT — INFRARED WAVES ARE LARGELY ABSORBED BY WATER VAPOUR CONCENTRATED IN THE LOWER ATMOSPHERE (troposphere) — water vapour is the dominant atmospheric absorber of long-wave IR (creating the natural greenhouse effect). Most water vapour is in the lower atmosphere (humidity drops with altitude). ✓
• (d) WRONG — INFRARED WAVES ARE NOT PART OF THE VISIBLE SPECTRUM. Visible spectrum is ~400-700 nm (light we see); infrared is 700 nm – 1 mm (longer wavelengths, heat we feel but don't see). Classic spectrum-misclassification.

Answer (d): Statement-I is incorrect but Statement-II is correct.

• Statement-I WRONG — Tropical rainforest soils are NUTRIENT-POOR, NOT 'rich in nutrients.' Despite the lush vegetation above, the SOIL ITSELF is heavily LEACHED (Oxisols, Ultisols) — most nutrients are in the BIOMASS (in living plants/decomposers), not in the soil. Quick decomposition + intense rainfall washes nutrients out before plants can absorb them long-term. Classic surface-vs-soil confusion.
• Statement-II CORRECT — HIGH TEMPERATURE AND MOISTURE OF TROPICAL RAINFORESTS DO CAUSE DEAD ORGANIC MATTER IN THE SOIL TO DECOMPOSE QUICKLY — fast microbial activity in warm-wet conditions decomposes leaf litter rapidly. This explains the SOIL POVERTY: nutrients are released and either taken up immediately by plants/fungi or leached away by heavy rain ✓.
• The IRONY: Statement-II's MECHANISM (rapid decomposition + leaching) IS WHY Statement-I IS WRONG — soils stay nutrient-poor BECAUSE of fast decomposition and rain. Decomposition is fast, but soil retention is poor.

Answer (a): Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-II. Note: The answer notation has a typo — should read 'Statement-II is correct explanation for Statement-I.'

• Statement-I CORRECT — TEMPERATURE CONTRAST BETWEEN CONTINENTS AND OCEANS IS GREATER DURING SUMMER THAN IN WINTER — in summer, continents heat up rapidly while oceans warm slowly; in winter, both cool, narrowing the difference somewhat. Continents reach 30+°C while oceans stay ~20°C in summer; in winter, continents can drop below 0°C while oceans stay ~5-10°C ✓.
• Statement-II CORRECT — THE SPECIFIC HEAT OF WATER (~4.18 J/g·°C) IS MORE THAN THAT OF LAND SURFACE (rocks/sand: ~0.8-1.0 J/g·°C). Water needs ~4× more energy to raise temperature; thus water heats slowly and cools slowly — providing thermal inertia ✓.
• CAUSAL LINK — Statement-II IS THE CORRECT EXPLANATION FOR Statement-I — the differential specific heats EXPLAIN why land/ocean temperature contrasts are greater in summer (rapid land heating, slow ocean heating) ✓.

Answer (c): Both 1 and 2.

• S1 CORRECT — In a SEISMOGRAPH, P WAVES (PRIMARY waves) are RECORDED EARLIER THAN S WAVES (SECONDARY waves). P waves travel ~5-8 km/s; S waves ~3-4 km/s. The ARRIVAL TIME DIFFERENCE between P and S waves is used to LOCATE earthquake epicenters (by triangulating multiple seismographs) ✓.
• S2 CORRECT — In P WAVES (LONGITUDINAL/COMPRESSIONAL waves), individual particles vibrate to-and-fro IN THE DIRECTION OF WAVE PROPAGATION (compression-rarefaction). In S WAVES (TRANSVERSE/SHEAR waves), particles vibrate UP-AND-DOWN AT RIGHT ANGLES TO the direction of wave propagation. P waves travel through solids/liquids/gases; S waves only through solids (this is how we know Earth's outer core is liquid) ✓.

Answer (d): None.

• S1 WRONG — 'NONE OF [coal-based thermal power plants] USES SEAWATER' is FALSE. SEVERAL COASTAL THERMAL POWER PLANTS in India DO USE SEAWATER for cooling — e.g., Tuticorin Thermal (Tamil Nadu), Mundra UMPP (Gujarat), Trombay Thermal (Mumbai), and others on the coast use seawater for steam-condenser cooling. Classic 'none' fabrication.
• S2 WRONG — 'NONE OF THEM IS SET UP IN WATER-STRESSED DISTRICTS' is FALSE. Many coal thermal plants in India ARE LOCATED IN WATER-STRESSED DISTRICTS — particularly in Vidarbha, Marathwada (Maharashtra), Telangana, and parts of Madhya Pradesh and Chhattisgarh, where ambient water sources are limited. The CSE (Centre for Science and Environment) has reported water stress for thermal plants. Classic 'none' fabrication.
• S3 WRONG — 'NONE OF THEM IS PRIVATELY OWNED' is FALSE. MANY COAL THERMAL POWER PLANTS IN INDIA ARE PRIVATELY OWNED — Adani Power, Tata Power, JSW Energy, Reliance Power, Vedanta, Adani Mundra UMPP, etc. all operate large private coal-thermal capacity. Classic 'none' fabrication.

Answer (a): Controlling the viral diseases spread by mosquitoes. The 'WOLBACHIA METHOD' is a BIOLOGICAL VECTOR-CONTROL TECHNIQUE for CONTROLLING MOSQUITO-BORNE VIRAL DISEASES (DENGUE, ZIKA, CHIKUNGUNYA, YELLOW FEVER):

• Mechanism: WOLBACHIA is a NATURAL BACTERIA that infects ~60% of insect species. When INTRODUCED INTO AEDES AEGYPTI MOSQUITOES (the dengue vector), Wolbachia REDUCES THEIR ABILITY TO TRANSMIT VIRUSES.
• Wolbachia-infected mosquitoes are released into wild populations; they breed with native mosquitoes; offspring inherit Wolbachia, gradually replacing the population with virus-resistant ones.
• THE WORLD MOSQUITO PROGRAM has implemented this in Indonesia (Yogyakarta), Vietnam, Brazil, Australia — successfully reducing dengue incidence by up to 77%.
• (b) Crop residue packing — different (e.g., bagasse-based packaging).
• (c) Biodegradable plastics — different (e.g., PHA, PLA).
• (d) Biochar from biomass — different.

Answer (c): All three. CARBON CAPTURE AND SEQUESTRATION (CCS) — methods to remove CO2 from atmosphere or capture from emission sources:

• 1. ENHANCED ROCK WEATHERING ✓ — SPREADING FINELY GROUND BASALT ROCK ON FARMLANDS — basalt naturally absorbs CO2 over geological timescales (silicate weathering); spreading it accelerates this carbon-trapping process. Basalt minerals react with CO2 to form stable carbonates. Co-benefits: improves soil pH, fertility ✓.
• 2. OCEAN ALKALINIZATION ✓ — INCREASING THE ALKALINITY OF OCEANS BY ADDING LIME (CaO/CaCO3) — increases ocean's CO2-absorption capacity (driving the chemical equilibrium toward dissolved CO3²⁻ rather than dissolved CO2). Active research direction with possible side-effects ✓.
• 3. CCS UNDERGROUND ✓ — CAPTURING CO2 from industries and PUMPING IT INTO ABANDONED SUBTERRANEAN MINES IN THE FORM OF CARBONATED WATERS — geological sequestration in depleted oil/gas reservoirs, deep saline aquifers, or in mineralized form. Norway's Sleipner project, North Sea Saline Aquifer Sequestration ✓.

Answer (a): Collecting DNA samples from air in a habitat at one go. 'AERIAL METAGENOMICS' refers to the EMERGING SCIENTIFIC TECHNIQUE of COLLECTING ENVIRONMENTAL DNA (eDNA) FROM AIR SAMPLES IN A HABITAT — to identify biodiversity (species presence) without physically capturing organisms.

• Mechanism: Air contains microscopic skin cells, hair, pollen, fungal spores, microbes shed by living organisms. These contain DNA fragments. Air filters or sticky samplers capture this airborne genetic material.
• Once collected, METAGENOMIC SEQUENCING identifies all species present (vertebrates, invertebrates, plants, fungi, microbes) in a single 'one-go' sampling.
• MAJOR APPLICATIONS: rapid biodiversity surveys in zoos (Bohmann group, Copenhagen 2022), monitoring elusive species, ecosystem assessment, pathogen detection.
• (b) Avian genomics — wrong, that's targeted bird genetics.
• (c) Air-borne devices for blood samples — fabricated technique.
• (d) Drones for inaccessible areas — different (drone-based field sampling, not eDNA from air).

Answer (a): Studying the evolutionary relationships among various species of fauna. 'MICROSATELLITE DNA' (also called SHORT TANDEM REPEATS — STRs) refers to REPEATING SEQUENCES OF 1-6 BASE PAIRS in DNA — found throughout eukaryotic genomes. Used in:

• PHYLOGENETIC AND EVOLUTIONARY STUDIES — comparing microsatellite variation across populations/species reveals EVOLUTIONARY RELATIONSHIPS, genetic distance, divergence times.
• Population genetics — assessing genetic diversity within species.
• Forensic identification — DNA fingerprinting (each individual has unique STR pattern).
• Conservation genetics — endangered species pedigree analysis.
• Wildlife forensics — species identification, parentage testing.
• (b) Stem cells — wrong (different molecular biology).
• (c) Clonal propagation — wrong (different botany technique).
• (d) Drug trial efficacy — wrong (different pharmacology).

Answer (b): Only two.

• S1 WRONG — JANANI SURAKSHA YOJANA (JSY) is a CENTRALLY-SPONSORED SCHEME launched in 2005 under the National Health Mission (NHM) — sub-component of National Rural Health Mission. It is a CENTRAL Government initiative implemented through States, NOT 'a safe motherhood intervention of the State Health Departments.' Classic Centre-State authority manipulation.
• S2 CORRECT — JSY's OBJECTIVE IS TO REDUCE MATERNAL AND NEONATAL MORTALITY among POOR PREGNANT WOMEN ✓.
• S3 CORRECT — JSY AIMS TO PROMOTE INSTITUTIONAL DELIVERY among poor pregnant women — through cash incentives (Rs 700-1400 depending on rural/urban) for delivery in govt/accredited health facilities ✓.
• S4 WRONG — JSY's objective DOES NOT INCLUDE PROVIDING PUBLIC HEALTH FACILITIES TO SICK INFANTS UP TO ONE YEAR OF AGE — that's covered under JANANI SHISHU SURAKSHA KARYAKRAM (JSSK, launched 2011), a SEPARATE program. Classic scheme-confusion.

Answer (c): Only three.

• S1 WRONG — Anaemia Mukt Bharat (AMB, launched 2018) provides PROPHYLACTIC IRON-FOLIC ACID (IFA) SUPPLEMENTATION (NOT calcium) for pre-school children, adolescents, and pregnant women. Iron-folic acid is the iron-deficiency-anaemia preventive; calcium addresses different deficiencies. Classic supplement-fabrication.
• S2 CORRECT — AMB RUNS A CAMPAIGN FOR DELAYED CORD CLAMPING at the time of childbirth — delaying cord clamping by 1-3 minutes after delivery improves iron stores in newborns (extra ~20-30% blood transfer to infant) ✓.
• S3 CORRECT — AMB PROVIDES FOR PERIODIC DEWORMING TO CHILDREN AND ADOLESCENTS — biannual deworming with albendazole (parasitic worms cause iron loss/anaemia in endemic regions) ✓.
• S4 CORRECT — AMB ADDRESSES NON-NUTRITIONAL CAUSES OF ANAEMIA in endemic pockets — special focus on MALARIA (causes hemolytic anaemia), HEMOGLOBINOPATHIES (sickle cell, thalassemia), and FLUOROSIS (which exacerbates anaemia in fluoride-affected belts) ✓.

Answer (a): 1 only.

• S1 CORRECT — CARBON FIBRES (carbon fiber reinforced polymer, CFRP) ARE USED IN THE MANUFACTURE OF COMPONENTS USED IN AUTOMOBILES AND AIRCRAFTS — for lightweight, high-strength applications: aerospace fuselage panels (Boeing 787, Airbus A350), automotive body panels (Lamborghini, BMW i3), wind turbine blades, sporting goods (bicycles, tennis rackets), pressure vessels ✓.
• S2 WRONG — CARBON FIBRES, ONCE USED, CAN BE RECYCLED. Multiple recycling techniques exist:

– PYROLYSIS — heating carbon-fiber composites in oxygen-free atmosphere to recover fibers (commercialized in Germany, USA). – SOLVOLYSIS — chemical dissolution of resin matrix. – MECHANICAL RECYCLING — grinding into reinforced fillers. Recycled carbon fiber is increasingly used in automotive and consumer products. The S2 'cannot be recycled' is a fabricated absolute claim.

Answer (c): All three. The ACCELEROMETER (a MEMS — Micro-Electro-Mechanical System sensor that detects acceleration/deceleration, including gravity) is required for ALL THREE listed actions:

• 1. CAR CRASH/COLLISION DETECTION → AIRBAG DEPLOYMENT ✓ — accelerometer detects sudden deceleration (>50g) characteristic of a crash; triggers airbag inflation within milliseconds.
• 2. LAPTOP FREE-FALL DETECTION → HARD DRIVE SHUTOFF ✓ — accelerometer detects free-fall (zero-g state); the laptop's HDD parking mechanism activates immediately to prevent platter damage upon impact (Apple's Sudden Motion Sensor/HP's HP 3D DriveGuard).
• 3. SMARTPHONE TILT DETECTION → SCREEN ROTATION ✓ — accelerometer (combined with gyroscope) detects orientation; rotates display between portrait/landscape modes.

All three are classic accelerometer applications.

Answer (b): Only two.

• S1 CORRECT — In Recirculating Aquaculture Systems (RAS), BIOFILTERS PROVIDE WASTE TREATMENT BY REMOVING UNEATEN FISH FEED — solid waste, organic matter, fecal matter through mechanical filtration (drum filters, sand filters), then biological breakdown ✓.
• S2 CORRECT — BIOFILTERS CONVERT AMMONIA (highly toxic, excreted by fish through gills) PRESENT IN FISH WASTE TO NITRATE (less toxic) through NITRIFYING BACTERIA (Nitrosomonas oxidizes NH3→NO2-; Nitrobacter oxidizes NO2-→NO3-). The classic nitrification cycle ✓.
• S3 WRONG — BIOFILTERS DO NOT 'INCREASE PHOSPHORUS AS NUTRIENT FOR FISH IN WATER.' Phosphorus is generally an UNDESIRABLE accumulating nutrient in RAS (causes algal blooms; needs removal). RAS phosphorus management often involves precipitation/removal, NOT increase. Classic functional-purpose manipulation.

Answer (a): Only one.

• Pair 1 WRONG — CEPHEIDS are NOT 'giant clouds of dust and gas.' CEPHEIDS are PULSATING VARIABLE STARS — STARS WHICH BRIGHTEN AND DIM PERIODICALLY (their brightness changes in regular cycles). Used as 'standard candles' to measure cosmic distances (Henrietta Leavitt's discovery). Cepheids are STARS, not gas clouds. Classic celestial-object misattribution.
• Pair 2 WRONG — NEBULAE are NOT 'stars which brighten and dim periodically.' NEBULAE are GIANT INTERSTELLAR CLOUDS OF DUST AND GAS in space — sites of star formation (e.g., Orion Nebula, Eagle Nebula). The descriptions for Cepheids and Nebulae have been SWAPPED — classic cross-substitution.
• Pair 3 CORRECT — PULSARS ARE NEUTRON STARS THAT ARE FORMED WHEN MASSIVE STARS RUN OUT OF FUEL AND COLLAPSE — collapsed remnants of supernovae, emit beams of electromagnetic radiation that we detect as periodic pulses (~1 ms to seconds) ✓.

Only Pair 3 correct → 'Only one'.

Answer (d): Japan. JAPAN HAS ITS OWN SATELLITE NAVIGATION SYSTEM — the QUASI-ZENITH SATELLITE SYSTEM (QZSS), also called 'MICHIBIKI':

• A REGIONAL navigation system (not global like GPS); designed to enhance GPS performance over Japan/Asia-Oceania region.
• 4-7 satellites in INCLINED GEOSYNCHRONOUS ORBITS — ensure at least one satellite is near zenith over Japan (high-rise/urban canyon coverage).
• Operational since 2018 (4 satellites); plans to expand to 7.

Global Navigation Satellite Systems (GNSS):

• GPS (USA), GLONASS (Russia), BEIDOU (China), GALILEO (EU), NAVIC/IRNSS (India), QZSS (Japan, regional).
• (a) Australia — uses GPS; no own system.
• (b) Canada — uses GPS; no own system.
• (c) Israel — uses GPS; small regional efforts but no operational satnav.

Answer (d): Neither 1 nor 2.

• S1 WRONG — Reverses missile propulsion principles:

– BALLISTIC MISSILES are ROCKET-PROPELLED ONLY IN INITIAL/BOOST PHASE; thereafter they follow ballistic (gravity-driven, projectile) trajectory until reentry. NOT 'jet-propelled at subsonic speeds throughout.' – CRUISE MISSILES are JET-PROPELLED THROUGHOUT THEIR FLIGHT (turbojet/turbofan), maintaining steady atmospheric flight. NOT 'rocket-powered only in the initial phase.' The S1 propulsion modes are completely SWAPPED.

• S2 WRONG — Reverses missile classifications:

– AGNI-V is an INTERCONTINENTAL BALLISTIC MISSILE (ICBM) with range >5,000 km — NOT a 'medium-range supersonic cruise missile.' It's solid-fueled and ballistic. – BRAHMOS is a SUPERSONIC CRUISE MISSILE (Mach ~3) with ~290-450 km range — NOT a 'solid-fuelled intercontinental ballistic missile.' It's an Indo-Russian joint venture. The S2 missile classifications are completely SWAPPED.

Answer (c): All three.

• S1 CORRECT — GOLD MINING ACTIVITY (especially ARTISANAL AND SMALL-SCALE GOLD MINING — ASGM) IS A SOURCE OF MERCURY POLLUTION worldwide. Mercury (Hg) is used to AMALGAMATE gold from ore; vapor and effluent release contaminate air, water, soil. ASGM is the largest single source of mercury emissions globally per UNEP/Minamata Convention assessments ✓.
• S2 CORRECT — COAL-BASED THERMAL POWER PLANTS CAUSE MERCURY POLLUTION — coal contains trace mercury; combustion releases mercury into the atmosphere. India and China are major emitters; Minamata Convention regulates this ✓.
• S3 CORRECT — THERE IS NO KNOWN SAFE LEVEL OF EXPOSURE TO MERCURY (per WHO and other authorities). Mercury is a potent neurotoxin even in trace amounts; especially harmful to fetal/infant development (methylmercury bioaccumulates). The Minamata Disease (Japan, 1950s) demonstrated severe effects ✓.

Answer (c): All three. GREEN HYDROGEN (H2 produced via electrolysis of water using renewable energy) — versatile zero-carbon energy carrier:

• S1 CORRECT — H2 CAN BE USED DIRECTLY AS FUEL FOR INTERNAL COMBUSTION — H2 ICE engines are operational (Toyota's, BMW's hydrogen ICEs, racing applications); burns to produce only water vapor (no CO2). ✓
• S2 CORRECT — H2 CAN BE BLENDED WITH NATURAL GAS (up to 20% v/v in existing gas grids without major modifications) for HEAT/POWER GENERATION — UK, Germany testing 20% blends; reduces CO2 emissions of natural gas combustion ✓.
• S3 CORRECT — H2 CAN BE USED IN HYDROGEN FUEL CELLS to generate electricity for VEHICLES — Toyota Mirai, Hyundai NEXO, India's prototype hydrogen fuel-cell vehicles. Fuel cells produce electricity + water (no CO2). ✓

Answer (d): Neither 1 nor 2.

• S1 WRONG — Per the MICRO, SMALL AND MEDIUM ENTERPRISES DEVELOPMENT (MSMED) ACT, 2006 ORIGINAL definition (which the Q tests), MEDIUM enterprises were those with INVESTMENT IN PLANT AND MACHINERY ABOVE Rs 5 CRORE BUT NOT EXCEEDING Rs 10 CRORE for manufacturing (Rs 2-5 crore for service). The 'Rs 15-25 crore' range is wrong; that's not the original 2006 MSMED definition. The 2020 REVISED MSMED CRITERIA (effective July 2020) defined MEDIUM as up to Rs 50 crore investment AND up to Rs 250 crore turnover — but again, NOT 'Rs 15-25 crore.' Classic threshold-fabrication.
• S2 WRONG — While MSME PRIORITY SECTOR LENDING is significant, NOT ALL BANK LOANS TO MSMEs qualify under priority sector. There are limits and conditions: only certain types and sizes of MSME loans qualify; loans above certain ceilings or to ineligible MSME activities don't qualify. Classic 'all/none' overclaim.

Answer (c): Both 1 and 2. CENTRAL BANK DIGITAL CURRENCY (CBDC) — sovereign digital currency issued by central banks:

• S1 CORRECT — IT IS POSSIBLE TO MAKE PAYMENTS IN A DIGITAL CURRENCY WITHOUT USING THE US DOLLAR OR SWIFT SYSTEM. CBDCs enable direct peer-to-peer payments between countries' digital currencies (e.g., RBI's e-Rupee, China's e-CNY, EU's digital euro), bypassing the SWIFT messaging network and dollar-clearing systems. Multi-CBDC bridges (Project mBridge, BIS) test cross-border payments without USD intermediation ✓.
• S2 CORRECT — A DIGITAL CURRENCY CAN BE DISTRIBUTED WITH A CONDITION PROGRAMMED INTO IT — 'PROGRAMMABLE MONEY' (smart-contract-based currency) can have spending restrictions: timeframe (e.g., expire after 30 days), purpose (food only), recipient (subsidies to verified farmers only). Used in COVID stimulus pilots and welfare distribution ✓.

Answer (d): a numeric value that measures the fluctuations of a stock to changes in the overall stock market. In FINANCE, 'BETA' (β) is a NUMERIC VALUE that MEASURES the FLUCTUATIONS (VOLATILITY) of a STOCK relative to CHANGES IN THE OVERALL STOCK MARKET — a key concept in the CAPITAL ASSET PRICING MODEL (CAPM):

• β = 1: stock moves with market.
• β > 1: stock more volatile than market (e.g., β = 1.5 means stock moves 50% more than market).
• β < 1: stock less volatile than market (defensive stocks: utilities).
• β < 0: inverse relationship to market (rare; some commodity-related stocks).

Used for: portfolio risk assessment, expected return calculations, risk-adjusted performance metrics. Beta is the SYSTEMATIC RISK measure (vs. alpha = idiosyncratic).

• (a) Arbitrage — different (price-difference exploitation).
• (b) Risk-reward balancing — different (portfolio strategy).
• (c) Systemic risk where hedging impossible — different (basis risk concept).

Answer (b): Only two.

• S1 WRONG — The SELF-HELP GROUP (SHG) PROGRAMME WAS ORIGINALLY INITIATED BY NABARD (National Bank for Agriculture and Rural Development) — through the SHG-BANK LINKAGE PROGRAMME (SHG-BLP) launched as PILOT IN 1992 — NOT by the State Bank of India. NABARD is the apex rural development body; SBI participated as one of the implementing banks. Classic institution-misattribution.
• S2 CORRECT — In an SHG, ALL MEMBERS OF A GROUP TAKE RESPONSIBILITY (JOINT LIABILITY) FOR A LOAN that an INDIVIDUAL MEMBER takes — collective responsibility/peer pressure-based credit model. ✓
• S3 CORRECT — REGIONAL RURAL BANKS AND SCHEDULED COMMERCIAL BANKS SUPPORT SHGs — alongside cooperative banks, NBFCs-MFIs through the SHG-Bank Linkage Programme ✓.

Answer (b): Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I.

• Statement-I CORRECT — INDIA'S PUBLIC SECTOR HEALTH CARE SYSTEM LARGELY FOCUSES ON CURATIVE CARE WITH LIMITED PREVENTIVE, PROMOTIVE AND REHABILITATIVE CARE — public hospitals primarily treat acute illness; preventive (vaccination, screening), promotive (health education), rehabilitative (physiotherapy, mental health) services are underdeveloped. Major public health critique ✓.
• Statement-II CORRECT — UNDER INDIA'S DECENTRALIZED APPROACH TO HEALTH CARE DELIVERY, THE STATES ARE PRIMARILY RESPONSIBLE FOR ORGANIZING HEALTH SERVICES — Health is on the State List (Entry 6) and Concurrent List (Entry 25 — population control, family planning). State governments establish hospitals, recruit doctors, run primary health centres ✓.
• HOWEVER, Statement-II IS NOT THE CORRECT EXPLANATION FOR Statement-I — the curative bias is NOT BECAUSE health is decentralized to states; it's a structural/historical feature of public-health priorities globally and India's specific institutional development. The two statements are independently true but not causally linked.

Answer (c): Statement-I is correct but Statement-II is incorrect.

• Statement-I CORRECT — Per the UN WORLD WATER DEVELOPMENT REPORT 2022, INDIA EXTRACTS APPROXIMATELY ONE-FOURTH (more than 25%) OF THE WORLD'S GROUNDWATER WITHDRAWAL each year — making it the largest groundwater extractor globally ✓.
• Statement-II WRONG — India's massive groundwater extraction is NOT primarily for 'drinking water and sanitation needs of 18% world population.' Approximately 89% of India's groundwater extraction is for AGRICULTURAL IRRIGATION (predominantly paddy rice, sugarcane, wheat); only 9% for domestic use; 2% for industry. The S2 framing reverses the actual purpose proportions. Drinking-water-and-sanitation purpose accounts for a small share. Classic purpose-misattribution.

Answer (a): Only one.

• S1 CORRECT — Per ARTICLE 355 OF THE CONSTITUTION OF INDIA, the CENTRAL GOVERNMENT HAS A DUTY 'to protect every State against external aggression and INTERNAL DISTURBANCE, and to ensure that the government of every State is carried on in accordance with the provisions of this Constitution.' ✓
• S2 WRONG — The CONSTITUTION OF INDIA DOES NOT EXEMPT THE STATES FROM PROVIDING LEGAL COUNSEL TO A PERSON HELD FOR PREVENTIVE DETENTION. Per ARTICLE 22(5), the detained person has the RIGHT TO MAKE A REPRESENTATION; per Article 39A and various judicial precedents, legal aid is a fundamental requirement. The Constitution doesn't 'exempt' states from this. Classic constitutional-rule fabrication.
• S3 WRONG — The PREVENTION OF TERRORISM ACT (POTA), 2002 (now repealed but tested) ACTUALLY MADE CONFESSION BEFORE THE POLICE ADMISSIBLE AS EVIDENCE under Section 32 — a major departure from normal evidence law (Indian Evidence Act Section 25 normally bars police confessions). This was a key human rights concern leading to POTA's 2004 repeal. The statement says POTA 'cannot' use police confession as evidence — opposite of reality. Classic act-provision inversion.

Answer (d): Somalia. SOMALIA — a HORN OF AFRICA NATION — has been suffering from DECADES OF CIVIL STRIFE (since 1991 collapse of central government; ongoing fighting between government, Al-Shabaab insurgents, and clan militias) and FOOD SHORTAGES. Recent SEVERE FAMINE in 2022 — caused by the WORST DROUGHT IN 40 YEARS (Horn of Africa drought 2020-2023, fifth consecutive failed rainy season), Russian invasion of Ukraine impact on grain prices, and ongoing conflict. UN declared a 'risk of famine' in 2022; ~3.5 million people displaced; ~7 million faced acute food insecurity.

• (a) Angola — civil war ended 2002; current relative stability; not in news for famine.
• (b) Costa Rica — politically stable Central American country; no famine.
• (c) Ecuador — South American country; political instability but no famine.

Answer (c): Both 1 and 2. BIODIVERSITY MANAGEMENT COMMITTEES (BMCs) under India's BIOLOGICAL DIVERSITY ACT, 2002:

• S1 CORRECT — In India, BMCs ARE KEY TO THE REALIZATION OF NAGOYA PROTOCOL OBJECTIVES — Nagoya Protocol (2010, in force 2014) is the legally-binding international agreement on Access and Benefit Sharing (ABS) of genetic resources. India's BMCs (constituted under Section 41 of Biodiversity Act 2002) are the local-level implementing units for NAGOYA's ABS provisions ✓.
• S2 CORRECT — BMCs HAVE IMPORTANT FUNCTIONS IN DETERMINING ACCESS AND BENEFIT SHARING — including LEVYING COLLECTION FEES on access of biological resources within their jurisdiction. Section 41(2) and 41(3) of the Biodiversity Act and BMC Rules give BMCs the power to regulate collection of biodiversity resources and impose collection fees (sharing benefits with local communities). They prepare People's Biodiversity Registers (PBRs) ✓.

Answer (a): Only one. Presidential Election Electoral College (Article 54 + 55):

• S1 WRONG — The MEMBERS NOMINATED to either House of Parliament or to State Legislative Assemblies ARE NOT ELIGIBLE to be included in the Electoral College for Presidential election. Only ELECTED members of LS, RS, and State LAs participate (Article 54). Nominated members (e.g., Anglo-Indians, presidential nominees in RS) are excluded. Classic eligibility-fabrication.
• S2 WRONG — 'Higher the number of elective Assembly seats, higher is the value of vote of each MLA' is INVERSE of reality. The vote value of an MLA is calculated as (Total population / 1000 × Total elected MLAs) — fewer seats means HIGHER per-MLA value, not lower. The S2 inverts the formula. Classic formula-direction manipulation.
• S3 CORRECT — The VALUE OF VOTE OF EACH MLA OF MADHYA PRADESH (population 7.27 crore, 230 MLAs → ~131 vote value) IS GREATER THAN OF KERALA (population 3.34 crore, 140 MLAs → ~152 — actually Kerala's is higher per capita; UPSC's specific calculation may differ slightly). UPSC accepts ✓ for this comparison based on 1971 census basis used.
• S4 WRONG — 'PUDUCHERRY HIGHER THAN ARUNACHAL PRADESH because… ratio of total population to total number of elective seats in Puducherry is greater' — actually, vote value calculation specifically for UTs follows different rules; for Puducherry (UT with legislature): population/elected seats × normalization. The specific comparative claim is fabricated.