Hii Gagandeep

Congratulations for your great performance in class 12th.

If we see the two fields, NDA and JEE.

These both fields are different from each other so it depends upon your interest that where you want to go in future.

If you want to serve army or any other government body than you may choose NDA as it's most reputed job also if you want to do engeneering from reputed colleges like IITs, you can go for JEE exam.

It's depend upon your interest that where you see yourself after 5 years.

You want to become an engineer or you want to serve army.

Hope this information would be helpful for you.

All the best for your career.