Interlinking lessons from different subjects in UPSC preparation is significant as it fosters a holistic understanding of issues. Topics often overlap across general studies, optional subjects, and current affairs, enhancing recall and providing deeper insights. This interconnected approach improves critical thinking skills by drawing analogies and recognizing patterns. It also allows candidates to construct comprehensive answers that demonstrate integrated knowledge during exams. Furthermore, synthesizing different subjects facilitates better retention as aspirants can relate concepts to real-world scenarios, strengthening their analytical abilities.