Candidates should focus on subjects that promote an interdisciplinary approach for UPSC, such as political science, sociology, and history. Understanding these subjects fosters connections between different fields, enriching perspectives on social issues. Geography and economics are also essential for grasping developmental policies and environmental challenges. Integrating current affairs with foundational subjects enhances the ability to analyze problems holistically. Interdisciplinary knowledge enables candidates to approach questions from multiple angles, thereby improving the quality of their responses in both written examinations and interviews, ultimately demonstrating a well-rounded intellect.