Hi Aspirant,

NDA 2020 will be conducted by UPSC. According to the eligibilty criteria:

• Those who wish to join the Navy or the Air Force wings must pass 10th or 12th standard examination from a recognized board. Physics and Mathematics are compulsory subjects.
• If a candidate wants to join the Army wing, the candidate must have passed 10th or 12th standard examination from a recognized board.

However, it is also mentioned that you are eligible if you are currently in the final year of the qualifying examination. Since you are in 12th right now, you are eligible to answer the examination.