Dear Aneesh, you haven't mentioned your Category. Neverthless, if you have score 55 in Biology and passed in your theory, we have to calculate your 12th aggregate. You have scored an aggregate of 53%. For being eligible for NEET, you should have completed 10+2, passed all the subjects and scored a minimum aggregate of 50% in Physics, Chemsitry and Biology. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. Even if you belong to General Category, because you secured an aggregate of 53%, you are eligible for NEET.