Hi,

As a 11th standard student you are not eligible for NDA exam as the candidate must have passed or must be appearing for the 12th standard exams from any recognized board. It is important as you will be required to produce the proof for passing the 10+2 in the month of December 2020.

You can check the eligibility criteria on the link given below:

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

Hope this addresses