Hi

Your profile suggests that your qualification is 12th, so guessing its about NDA.

No, you are not eligible for navy as you wouldn't have studied physics in 10+2

But yes,

You are eligible for Army.

This is because,

For army, you need 10+2 qualification in any stream but for navy and air force it is mandatory to have maths and physics in 10+2.

For your reference,

NDA eligibility criteria is given below:-

-------------) Qualifucation required :-

• For army :- you need educational  qualification of 10 + 2 in any stream .

• For navy and Airforce :- you need qualifucation of 10 + 2 with Physics and Maths .

-------------) You must be  in the age group of 16.5 to 19.5 years old to be eligible.

-------------) Now girls are also eligible for NDA, details available at https://news.careers360.com/nda-2021-sc-allows-women-appear-in-national-defence-academy-exam-slams-army-for-gender-discrimination

-------------) Nationality

For details you can visit our page, the link for the same is provided below

https://competition.careers360.com/articles/nda-eligibility-criteria

Thank you