The optional subject plays a very important role in UPSC preparation. If a student chooses the wrong optional, it can be very detrimental to the entire preparation process. Generally, students tend to choose an optional subject that can also be used in their GS papers.
Although this is not a wrong approach, subjects like History,Geography,Economics as optional often become very bulky and complicated. Subjects such as PSIR and Public Administration involve so much current affairs that managing them becomes very difficult, and they almost turn into an examination in themselves.
PHILOSOPHY, A LOOPHOLE IN UPSC CSE
Why to choose Adhisthan IAS for Philosophy Optional
Philosophy complete course