Dear Sir, I have completed my B.Tech in Mechanical Eng in this year, but I have still back log of 3 subjects, Schedule for these subject's re exam is in Nov 13 and I am sure that I will come out of B.Tech with an aggregate 60% plus. I wish to join in the defense preferably in air force services. Sir, I would like to know about 1. Whether I shall be eligible for defense. 2. If so which service I should prefer. 3. How to peruse it Kindly advise and inform me the details please