29 YEAR UPSC PREVIOUS PAPER UPSC CIVIL SERVICES IAS PRELIMS GS -66 PRELIMS & 238 MAIN TOPIC - WISE CSAT 13 YEARS' CSAT PAPERS ESSAY TOPIC-WISE ESSAYS OF 29+ YEARS INDIA'S BELOVED UPSC GURU BESTSELLING AUTHOR AND ESTEEMED INSTRUCTOR 15 + YEARS TEACHING AT TOP IAS COACHING INSTITUTES IN DELHI MENTOR OF THOUSANDS OF SUCCESSFUL UPSC CANDIDATES.