How can I select the best optional for the 2020 IAS exam? Tagged: optional subject for ias mains exams This topic has 0 replies, 1 voice, and was last updated 5 years, 2 months ago by shamaarora. Viewing 1 post (of 1 total) Author Posts October 19, 2019 at 3:34 pm #2042 shamaaroraParticipant Optional subject…. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In