You haven't mentioned the date you were born. Nevertheless, for you to be eligible for NEET, you should be 17 years atleast by December 31st of the year of admission. Now 2020 registrations have been closed and so you cannot appear for NEET 2020. Let's say you want to appear for NEET 2021, you should be 17 years atleast by December 31st, 2021. But you will be 16 years and few months and so cant appear for NEET. You will have to wait until 2021 to appear for NEET. Along with age criteria, what also is important is minimum aggregate. To be eligible for NEET, you should have completed your 12th, passed in all subjects and secure a minimum aggreggate of 50% in Physics, Chemistry and Biology. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. Now if you belong to OBC Category, the Category you belong to should be also listed in the Central OBC list. Or else you will be considered as General Category and so you have to secure a minimum aggregate of 50% in Physics, Chemistry and Biology. This 50% is inclusive of the Theory and Practical marks scored in Physics, Chemistry and Biology collectively. You needn't score 50% in Physics, 50% in Chemistry and 50% in Biology separately. You need an aggregate of 50% or 40% depending on your Category as an aggregate in Physics, Chemistry and Biology. And along with Physics, Chemistry and Biology, you should also have studied English as one of the core subjects in your 12th.