College can give 12 class migration certificate if we drop out after bsc 2ndyear
Nope! If you need the School leaving certificate or the Migration certificate then it can only be issued by the School/Institute from which you have completed your 12th. If you drop in BSc 2nd year then you may need to make a Gap certificate (if required) as per the rules of the counselling committee (if required for any examination).
I hope this answer helps. All the very best for your future endeavors!