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Union Public Service Commission (UPSC)
Official PDFUPSC Civil Services Prelims 2026 Official Answer Key (GS Paper 1 & CSAT)
Exam Date: June 2026
Release / Challenge Window: Active
Verified Official Answer Key & Objection Portals
Access your official response sheet and challenge answers directly on the commission portal without deceptive ads.
How to Calculate Your Expected Raw Score
Correct Question: Allocate +1 or +2 marks as per official notification scheme.
Incorrect Question: Deduct negative marking penalty (typically 0.25, 0.33, or 0.50 marks per wrong answer).
Unattempted Question: 0 marks (no negative deduction).
Estimated Score = (Correct Answers × Marks per Correct) − (Wrong Answers × Penalty)
How to Submit an Objection / Challenge
- Log in to the Objection Portal (Server 1) with your credentials.
- Navigate to the Question Paper / Challenge Window.
- Select the question ID you wish to contest and indicate the correct option as per your evidence.
- Upload documentary proof (NCERT, Standard Reference Textbook, or Gazette citation).
- Pay the prescribed objection processing fee (typically Rs 50 - Rs 100 per challenge) online.
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