**What subjects hold maximum weightage in the UPSC Civil Services Mains?**
In the UPSC Civil Services Mains, subjects with the highest weightage include General Studies Paper I (Indian Heritage and Culture), General Studies Paper II (Governance, Constitution, Polity), General Studies Paper III (Technology, Economic Development), and General Studies Paper IV (Ethics, Integrity, Aptitude). Additionally, the Optional Subject, chosen by candidates, significantly impacts their overall score. The Essay paper also carries considerable importance, allowing candidates to showcase their writing skills and analytical abilities. A thorough understanding of these subjects is crucial for candidates aiming for high marks in the Mains examination.