Optional subjects significantly impact final rankings for UPSC candidates as they contribute to the overall score. Candidates often choose subjects based on their strengths and interests, influencing subsequent performance. A high score in an optional subject can elevate a candidate’s chances of securing a top rank, given the graded nature of the exam. Strategic selection of optional subjects aligned with effective preparation can lead to a competitive advantage, making informed choices crucial for aspirants aiming for success in the UPSC exams.