Interdisciplinary knowledge significantly aids in answer formation for the UPSC as it enables a holistic perspective on complex issues. For instance, integrating insights from politics, economics, and sociology allows candidates to formulate comprehensive responses on governance and public administration. An interdisciplinary approach enriches the analysis by considering multiple viewpoints, leading to well-rounded arguments. An understanding of historical contexts and contemporary trends helps in illustrating points more effectively. Such breadth of knowledge empowers candidates to demonstrate critical thinking and analytical depth in their answer writing, vital for securing higher marks.