UPSC incorporates diverse subjects through its examination pattern by assessing a comprehensive range of topics across various disciplines, including history, geography, political science, and economics. The integration of different subjects encourages candidates to have a multidisciplinary understanding, essential for effective governance and public administration. The inclusion of both optional subjects and General Studies papers ensures that aspirants possess broad knowledge and can tackle complex issues from multiple perspectives. This diverse assessment is crucial for selecting well-rounded individuals for civil service roles.