sir if i will passed my graduation by bio site . then what kind of problem I will face in NDA EXAM

Hello,
National Defence Academy Examination is conducted every year twice for admission to NDA and NA and hence on subsequent training join Indian defence forces as officer.
The eligibility criteria for NDA examination is that the candidate should have completed class XII or be in final term of it for Army and he should have studied Maths and Physics for Air Force and Navy.
So, yes, you are eligibile for Army through NDA exam even if you have not studied Maths in Class XII.
However in NDA Examination paper 1 is of Mathematics whose syllabus is of class XI and XII for 300 marks. So it will be very difficult for you to clear this paper.

Follow this link for more information on NDA examination
https://competition.careers360.com/exams/nda

Good luck