now iam apeering 12 class ..my age is 17 years. can i apply nda exam 2020
Yes, you can apply for NDA exam. As per the upsc guidelines led for nda exam 2020, the candidate must be an unmarried man, falling between the age group of 16.5 to 19.5 years. For army he should have cleared 12th class and for navy/air force he should have cleared 12th clas with maths and physics. So, you fall in the eligibility criteria.
You can apply.
I hope this helps.