An aspirant has to have a deep insight into the optional in which he is appearing at?

Experience  of successful candidates has disproved this largely accepted fact. Aspirants who have not had adequate time to grasp the nuances of the subject have also scored high. Perhaps this is because of good writing skills and proper approach to the subject. The trend of scores  in the previous examination indicates that the UPSC expects a general level of knowledge  rather than a scholarly attitude