I owe my success to GO. This is the best place for previous year question and explanation. Never thought I will get into top 100 . I can surely tell one thing, doing all the previous year questions honestly , will land you in top 100 ( I am definitely not suggesting to mug them). Unfortunately I have never contributed as such to GO,only countless upvotes (if that counts) to the beautiful answers by experts like Arjun Sir , Bikram Sir , Habib Sir , Praveen Sir (TOC answers) , Sachin Sir ,Praggy Sir (always seen him answering the most difficult math questions) and many more . I know only these words will do no justice , but thanks again.