Tell me which sub. is best for mains and how i prepared for G.S. for pre and for mains bcoz i cant learn gs

Hi, The compulsory papers are One Indian Language, Essay, General Studies and English. The optional subjects for the exam are as follows: Agriculture Mathematics, Animal Husbandry & Veterinary Science, Mechanical Engineering Botany, Medical Science, Chemistry, Philosophy, Civil Engineering, Physi

Your marks doesnt suggest that yo donot have good memory.memorisation of fact and values is an important aspect of any exam in india. but memorisation alone doesnot decides everything,it is your understanding capability and analytical skill and your will to do hard work that matters most in IAS EXAM