Improving accuracy in UPSC Prelims starts with strong conceptual clarity. Instead of adding new sources, revise core subjects repeatedly so facts and concepts stay fresh during the exam. Weak recall often leads to negative marking.

Practice elimination techniques consciously. In most questions, two options can be removed using logic, keywords, or basic understanding. Train yourself during mock tests to eliminate systematically rather than guessing emotionally.
Finally, analyze every mock test deeply. Track where it drops — conceptual gaps, misreading, or overconfidence. Consistent revision plus honest mistake analysis is the fastest way to improve accuracy and clear Prelims confidently.