Alternatively, if he gives his first preference for Naval Academy, he has to follow it with his preference for the three wings of the NDA. The eligibility for age is A candidate must be an unmarried male and have attained the age of 16 1/2 years and must not have attained the age 19 years on the 1st January or 1st of July of the year succeeding the year of examination. Candidates must not marry until they complete their full training. A candidate who marries subsequent to the date of his application, though successful will not be selected for training. A candidate who marries during training shall be discharged and will be liable to refund all expenditure incurred on him by the Government. Educational Qualifications is For Army wing of National Defence Academy 12th Class pass of the 10+2 pattern of School Education or equivalent examination conducted by a State Education Board or a University.