UPSC 2014 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2015 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2016 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2017 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2018 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2019 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2020 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2021 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper 2022 Prelims GS paper CSAT paper Mains GS-1 paper Mains GS-2 paper Mains GS-3 paper Mains GS-4 paper Eassy paper