The good news is there is no upper age limit for NEET as of now. If you have studied Physics and Chemistry already in your 12th, you can take up Biology as an additional subject from NIOS. You will need a minimum aggregate of 50% in Physics, Chemistry and Biology combined. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. This is the only way to be eligible to study MBBS as NEET is the only entrance examination for admission to MBBS, BDS, Ayush and Veterinary Colleges across India. To study MBBS/BDS abroad as well NEET is mandatory.