Uma, no Candidate can be eligible for General Category and a Reserved Category. That is the first thing to be considered. Both of them are 2 different Categories. If you belong to SC Category at State level and that falls under General Category at Central level, you should be selecting General Category and confine SC reservation to State level. But again you cannot change your Category for every round. The last chance for you to change your Category was the NEET PG correction window. Beyond that you cannot change your Category. If you have been selected under SC Category in Round 1, you cannot apply under General Category for Round 2. That is not possible.