Usually a separate merit list is prepared for NCC Cadets who have "C" Certificate. You have to apply for SSB which happens twice a year. So through SSB, you can get into OTA. But for that you should have completed your Graduation in any discipline with a minimum aggregate of 50% and should be between 19-25 years. But if you are still in our 2nd year of Bachelor's degree, you need to wait until the next year.