Subjects categorized as overlap subjects, such as Political Science, Sociology, and Geography, can significantly benefit UPSC preparation. These subjects often share topics with both General Studies and essay components, allowing candidates to maximize their study efforts efficiently. By choosing these overlap subjects, aspirants can deepen their understanding of overlapping themes like governance, human geography, or social structures. It optimizes preparation and enhances knowledge retention through integrated learning, facilitating better performance across multiple segments of the UPSC exam.