Sarath, for being eligible for NEET, you should have completed your 12th with Physics, Chemistry, Biology and English as your core subjects. Now Students who have studied BIology as an additional subject or who have studied in NIOS are also eligible for NEET. You should have completed your 12th with a minimum aggregate of 50% in Physics, Chemistry and Biology. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. So if you fulfil these conditions, even if you have 2 marks sheets, you are eligible for NEET.