Hello Prathamesh,

The eligibility criteria is as follows for NDA:

• A candidate must have passed 10+2 with Mathematics, Physics, Chemistry and English as compulsory subjects from a recognised university or board.
• The age must be in between 16.5 years to 19.5 years.

If you are from PCM background then you are eligible for NDA.You need to fulfill the eligibility criteria.

You can get more detailed information on NDA eligibility criteria which will be useful to you by using the link below

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

I hope this is helpful to you.