Rehan, to be able to appear for NEET, the minimum educational qualification is 12th. Any course beyond that is an over qualification. And to bring uniformity to the structure of the exam, only the minimum aggregate of your 12th is considered. So even if you have scored good in any other course except for 12th but failed to secure the required aggregatr in your 12th, unfortunately you do not qualify in NEET. Your 12th aggregate is considered but not B.Sc aggregate because 12th is the minimum required educational qualification for NEET and not B.Sc. So your aggregate in B.Sc is irrelevant while calculating NEET eligibility.