The subjects included in the UPSC Prelims exam comprise two papers: General Studies Paper I and General Studies Paper II (CSAT). Paper I encompasses topics such as Indian polity, geography, history, current affairs, economic developments, and environmental ecology. Paper II, the CSAT, evaluates candidates on comprehension, reasoning ability, and numerical proficiency, assessing the aptitude required for civil services. Each paper is essential, contributing to candidates’ overall performance; thus, a thorough understanding of both subjects is critical for success in the Prelims.