Admissions Open for the 2026 Self-Study Plan. Enroll Now!
+91 - 7893910103 support@upscguide.in

UPSC Prelims 2025 Answer Key OUT - Download Now

img

UPSC Prelims 2025 – Answer Key & Detailed Analysis by UPSC GUIDE

The UPSC Civil Services Preliminary Examination 2025 was conducted on 25th May 2025. Soon after the exam, UPSC GUIDE released the unofficial answer key and a detailed analysis for both GS Paper 1 and CSAT (Paper 2) to help candidates evaluate their performance.

 Answer Key Highlights

✅ GS Paper 1:

  • Unofficial answer keys are available for all sets (A, B, C, D).
  • Prepared by experienced faculty at UPSC GUIDE.
  • Helps aspirants estimate their probable scores and assess their chances of clearing prelims.

✅ CSAT (Paper 2):

  • Conducted from 2:30 PM to 4:30 PM.
  • A qualifying paper, requiring 33% marks to pass.
  • USPC GUIDE also provided a detailed CSAT answer key to help students understand their performance.

 UPSC Prelims Exam Analysis Subject-Wise

Level of Difficulty:

  • GS Paper 1 was seen as moderate to difficult, with questions requiring conceptual clarity and deep understanding.
  • CSAT remains tricky for many students, especially those from non-mathematics backgrounds.

Subject

Year 2025

Environment

10

History

12

Geography

14

Economics

21

Science & Technology

15

Polity

15

Current Affairs

13

Download The Question Paper of GS Paper -I

SET – GS Paper I

UPSC Prelims 2025 Question Paper PDF

GS Paper 1, Set A

Download Here

GS Paper 1, Set B

Download Here

GS Paper 1, Set C

Download Here

GS Paper 1, Set D

Download Here

Answer Key of UPSC 2025 Prelims GS Paper -I

UPSC CSE Prelims 2024 - Answer Key
SET "A"
Question No. Answer Question No. Answer Question No. Answer Question No. Answer
1 B 26 C 51 C 76 B
2 D 27 A 52 C 77 C
3 B 28 C 53 A 78 A
4 B 29 C 54 A 79 C
5 D 30 C 55 C 80 D
6 C 31 B 56 D 81 A
7 B 32 C 57 D 82 A
8 A 33 B 58 A 83 B
9 A 34 A 59 C 84 B
10 A 35 B 60 B 85 A
11 C 36 C 61 D 86 A
12 C 37 D 62 A 87 C
13 B 38 B 63 A 88 B
14 A 39 B 64 C 89 D
15 B 40 B 65 D 90 A
16 C 41 C 66 C 91 B
17 B 42 D 67 C 92 D
18 D 43 C 68 A 93 C
19 B 44 C 69 B 94 D
20 C 45 D 70 D 95 A
21 B 46 B 71 B 96 D
22 C 47 C 72 C 97 C
23 A 48 D 73 B 98 D
24 D 49 D 74 A 99 A
25 C 50 B 75 C 100 B

UPSC CSE Prelims 2025 - Answer Key
SET "B"
Question No. Answer Question No. Answer Question No. Answer Question No. Answer
1 C 26 C 51 D 76 C
2 D 27 B 52 D 77 C
3 C 28 D 53 C 78 A
4 C 29 B 54 D 79 B
5 D 30 C 55 A 80 D
6 B 31 B 56 D 81 C
7 C 32 D 57 C 82 C
8 D 33 B 58 D 83 A
9 D 34 B 59 A 84 A
10 B 35 D 60 B 85 C
11 B 36 C 61 A 86 D
12 C 37 B 62 A 87 D
13 B 38 A 63 B 88 A
14 A 39 A 64 B 89 C
15 B 40 A 65 A 90 B
16 C 41 B 66 A 91 B
17 D 42 C 67 C 92 C
18 B 43 A 68 B 93 B
19 B 44 D 69 D 94 A
20 B 45 C 70 A 95 C
21 C 46 C 71 D 96 B
22 C 47 A 72 A 97 C
23 B 48 C 73 A 98 A
24 A 49 C 74 C 99 C
25 B 50 C 75 D 100 D

UPSC CSE Prelims 2025 - Answer Key
SET "C"
Question No. Answer Question No. Answer Question No. Answer Question No. Answer
1 D 26 B 51 C 76 C
2 D 27 C 52 D 77 A
3 C 28 A 53 C 78 C
4 D 29 C 54 C 79 C
5 A 30 D 55 D 80 C
6 D 31 D 56 B 81 C
7 C 32 A 57 C 82 C
8 D 33 A 58 D 83 B
9 A 34 C 59 D 84 A
10 B 35 D 60 B 85 B
11 A 36 C 61 B 86 C
12 A 37 C 62 C 87 B
13 B 38 A 63 B 88 D
14 B 39 B 64 A 89 B
15 A 40 D 65 B 90 C
16 A 41 C 66 C 91 B
17 C 42 C 67 D 92 D
18 B 43 A 68 B 93 B
19 D 44 A 69 B 94 B
20 A 45 C 70 B 95 D
21 B 46 D 71 B 96 C
22 C 47 D 72 C 97 B
23 B 48 A 73 A 98 A
24 A 49 C 74 D 99 A
25 C 50 B 75 C 100 A

UPSC CSE Prelims 2025 - Answer Key
"D"
Question No. Answer Question No. Answer Question No. Answer Question No. Answer
1 B 26 A 51 B 76 C
2 C 27 C 52 D 77 B
3 B 28 B 53 B 78 D
4 A 29 D 54 B 79 B
5 C 30 A 55 D 80 C
6 B 31 C 56 C 81 C
7 C 32 C 57 B 82 D
8 A 33 A 58 A 83 C
9 C 34 A 59 A 84 C
10 D 35 C 60 A 85 D
11 D 36 D 61 B 86 B
12 A 37 D 62 C 87 C
13 A 38 A 63 A 88 D
14 C 39 C 64 D 89 D
15 D 40 B 65 C 90 B
16 C 41 D 66 C 91 B
17 C 42 D 67 A 92 C
18 A 43 C 68 C 93 B
19 B 44 D 69 C 94 A
20 D 45 A 70 C 95 B
21 A 46 D 71 C 96 C
22 A 47 C 72 C 97 D
23 B 48 D 73 B 98 B
24 B 49 A 74 A 99 B

Download PDF Here