Chaitra, As a student belonging to OBC Category, you should pass in all subjects in your 12th and score a minimum aggregate of 40% in Physics, Chemistry and Biology including Theory and Practicals. So to be eligible for NEET, you should pass both in Theory and Practicals separately. Or else you do not qualify for NEET. For example, if you take Physics, you should score pass marks in Theory in Physics and then also secure 40% in Physics, Chemistry and Biology together. You should also pass in Theory in Chemistry and Biology.