UPSC Previous Papers UPSC Civil Services (CSE) IAS / IPS previous years (old) question papers of Prelims(both GS and CSAT), Mains including Essay, GS 1, GS 2, GS 3, GS 4, Geography optional, Anthropology optional, Telugu Literature, Political science, Public Administration, Sociology 2021 2020 2019 2018 2017 2016