Hi aspirant,

Yes you would be eligible for entry into Indian Air force through NDA examination because you meet the required criteria. As per the rules a candidate needs to have Physics, Chemistry, and Mathematics as his/her subject in senior secondary education to be eligible for the air force and Navy wings of NDA while mathematics is required for entry into Indian military. But I would want to tell there would be no relaxations or anything such for  you would have to clear the required cutoffs for the mathematics as well as general aptitude section along with the overall cut off.

Hope it helps!