Answer Key
UPSC Prelims 2023, GS Paper 1: Answer Key and Subject-Wise Analysis
99 questions, cross-verified against the official UPSC answer key. Conducted 28 May 2023 (Set C, booklet series XDTG-F-GST/62C).
Subject distribution
Counted directly from the question bank, not estimated, so these numbers match exactly what you will see if you filter the practice list yourself.
| Subject | Questions | Share |
|---|---|---|
| Environment | 19 | 19% |
| Polity | 19 | 19% |
| Economy | 15 | 15% |
| Current Affairs | 13 | 13% |
| Geography | 11 | 11% |
| Science & Technology | 10 | 10% |
| History | 9 | 9% |
| Art & Culture | 3 | 3% |
Difficulty breakdown
Easy
13
Medium
69
Hard
17
Standout questions
These made aspirants pause, either because they were unusually difficult, unusually novel, or because they signal a shift in how UPSC is framing questions.
Q30 · Polity
Presidential election: Electoral College and value of votes
A calculation-adjacent fact most aspirants get half right: the Presidential Electoral College includes elected MPs and elected State Assembly members, but explicitly excludes nominated members and Legislative Council members entirely, a distinction the stem tests from three separate angles at once.
Practise this question →Q11 · History
Colonial-era archaeologists of India
Four names most aspirants have never grouped together, tied only by their shared role excavating and documenting ancient Indian sites for the Archaeological Survey of India. A pure historiography-of-archaeology question, rare even by UPSC's standards.
Practise this question →Q54 · Art & Culture
Sangam-era social and literary practices
Sangam literature prep usually stops at the Ettuthogai and Pattupattu anthologies. A specific warrior-honour ritual, a defeated king facing north and fasting to death rather than living with the shame of a wound taken in the back, is a far deeper cut into the source material.
Practise this question →Q26 · Environment
India's groundwater extraction
A real statistic (India draws over a quarter of the world's annual groundwater) paired with a plausible-sounding but overstated second claim. The kind of Statement-I/Statement-II pair built specifically to catch anyone who accepts a big number without checking what it is actually claimed to explain.
Practise this question →Q71 · Economy
Infrastructure Investment Trusts (InvITs)
Precise, easy-to-reverse tax detail: InvIT interest income is taxable in unit-holders' hands, dividend income can be exempt, the opposite of what the stem's first statement claims. Paired with a genuinely obscure legal fact, InvITs count as 'borrowers' under the SARFAESI Act.
Practise this question →Q95 · Geography
Coastal landform evolution
Four Indian marshlands, four different formation mechanisms, and only one, the Rann of Kutch, actually formed through repeated sea-level fall rather than river deposition or sand-bar action. A geomorphology question that punishes memorising marshland names without their causes.
Practise this question →Key takeaways
Environment and Polity tied as the joint-heaviest subjects at 19 questions each, the first of the three years analysed so far where Environment matched Polity for weight. Treating Environment as a lighter subject than Polity would have cost real marks in 2023.
Current Affairs was tested directly 13 times, the highest pure count of the years analysed so far, and several Environment and Economy questions also leaned on recent reports and regulatory changes rather than settled textbook fact.
Art and Culture stayed thin at 3 questions, consistent with how lightly it has weighed in other years too. Minimal, consistent prep here still beats skipping it outright.
The medium block was dominant, 69 of 99 questions, the highest medium share of the years analysed so far. A paper this medium-heavy rewards patient, correct elimination far more than either raw recall or guessing on the hardest questions.
What to read next
Concepts from this paper that already have a study note behind them.