Prelims

What are books that we have to refer to for prelims?
What are books that we have to refer to for prelims?

UPSC conducted the Prelims for CSE 2021 on 10th October. Paper was more random than last couple of years.  It was less logical and more factual than last four years. UPSC even touched state PCS level questions like one liner History questions, questions from sports etc. Obscure Science and Technology questions, random organisms were touched.

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