Hello vikrant,

Hope you are doing well.

As per your question, as per their rules and regulation of eligibilty , candidate should not be lesser than 15.7 year and not be greater than 18.7 years. So as per their maximum age eligibilty your date of birth should be earlier than 2nd january 2002 (19 years).

So as per this eligibilty you are eligible for this exam. You can give this exam one more time as per their guidelines. Also if you don't know this year exam is been postponed due to this pandemic.

So for more updates and information you can visit:-

https://www.google.com/amp/s/competition.careers360.com/articles/nda/amp

Hope this information helps you out. Thank you.