Appearing & After  appearing student class 12th can apply for NDA exam. Have you filled the form? you can check other information & exam date with given below link.
NDA Eligibility

Dear

Yes Student from class 12 are eligible to give exam but according to me you should complete Bachelor degree and prepare yourself in every sense like physically , mentally and iq level wise.

Your knowledge , iq level and focus mind is more important key role to clear the NDA process .

All the best

Yes u can and you should give it you will get experience

yes offcourse......u can apply for NDA

National Defence Academy & Naval Academy Examination

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