Top 20 Most Asked Topics — UPSC - CSE
Ranked by question frequency across 862 Paper 1 PYQs (2018–2026). Focus your revision on these high-yield subtopics.
#SubtopicPYQsShareTrend
1Indian Economy & Planning
Economics83
9.6%2Environment & Ecology
Environment69
8.0%3Biology & Health
Science54
6.3%4Constitution & Amendments
Polity46
5.3%5Modern India & Freedom Struggle
History42
4.9%6Ancient India
History42
4.9%7Physical Geography
Geography38
4.4%8International Affairs
Current Affairs32
3.7%9Technology & Space
Science32
3.7%10National Events & Policy
Current Affairs28
3.2%11Physics
Science27
3.1%12Indian Geography
Geography26
3.0%13Governance & Public Policy
Polity25
2.9%14Chemistry
Science25
2.9%15Parliament & Legislation
Polity24
2.8%16Medieval India
History23
2.7%17Industry & Trade
Economics22
2.6%18Agriculture & Rural
Economics19
2.2%19Art, Culture & Heritage
History19
2.2%20World Geography
Geography18
2.1%