Dear Farhan, once you join MBBS, there is no Category preference. You will have to clear all the subjects as per the MCI guidelines. Reservation doesnt apply to Academics. But if your question is the marks required for an OBC Candidate to be eligible in NEET, it is 40 percentile of the top NEET score. That is the cut off.  Having said that   mere scoring the cut offs cannot secure you a MBBS seat.