Hi aspirant,

According to the current eligibility criteria set up by UPSC, the body which conducts the NDA examination candidates between age limit of 16.5 to 19.5 years,(July 2, 2005, to July 1, 2002 ) can apply online for the National Defence Academy (NDA) & Naval Academy (NA) 2022 exam. Also you need to have a intermediate certificate or must be an appearing candidate. So your last attempt will be NDA 2 2023 and since you have achieved age of 16.5 years you can appear for the exam till the date mentioned above but only if you fulfill all eligibility criteria.

Hope it helps!!