hello coder himanshu

I hope you are doing good. As per your query , i would like to aware you that To be an eligibile for a nda exam you age must be  below 18.5 years . If we take your example, you will turn into 18years 2july 2021 which shows that you have only 1 attempt remaining NDA 1 2021. I would like to advise you that just go through 10 years and give mocks .Moreover, do maths section wisely because you will be qualified only if you clear maths section.

Hope you found this answer helpful. Good luck for your future