Hello,

Here is the eligibility criteria to appear for National Defence Academy (NDA) entrance examination conducted by NDA

• A candidate must have passed 10+2 with Mathematics and Physics from a recognized board to join in Indian Naval Academy and Indian Airforce Academy
• A candidate must have passed 10+2 in any stream from a recognized board to join in Indian Military Academy.
• The age must be in between 16.5 years to 19.5 years.

You haven't mentioned if you have studied Physics in 10+2 level if you have studied Physics along with Mathematics then you can join any Academy but if you haven't Studied Physics then you are eligible to join IMA provided you must fulfill the age criteria.