Hello aspirant,

According to your date of birth, your age is 17 years 5 months. If we talk about eligiblity.

The eligibility criteria states that a candidate needs to be between 16 years and 6 months old to 19 years and 6 months old. The exam is held twice a year. You  can get as many attempts as you want as long as you are within the age criteria.

So if you attempt both the exam in a year so you will have 3 to 4 attempts maximum.

Please visit this link for more information about age limit.

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

Hope this helps you

Feel free to ask any questions

All the best for your future