Hi Neelesh,

The number of attempts in NDA depends on your age. The minimum age limit is 16.5 and the maximum age limit is 19.5. That is when you apply for NDA, you must be less than 19.5 years of age. So I guess you just have one more chance to attempt NDA Exam. So please hurry up. For more information, you might follow the link:-

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

Hopefully this helps and All the Best.