i have 12 from pcm cbse and having additional biology from nios then i eligible for air force medical assistant

For the Indian Air Force Medical Assistant/Airman Medical Assistant entry, the educational qualification generally requires Physics, Chemistry, Biology and English in Class 12/equivalent, along with the prescribed minimum percentage.

If you completed Class 12 with PCM from CBSE and subsequently obtained Biology through NIOS, you should not assume that the NIOS Biology certificate will automatically make you eligible. The recruitment notification and document-verification rules must specifically permit the combination of qualifications from separate boards.

Since Air Force recruitment involves strict document verification, the safest approach is to check the specific Medical Assistant recruitment notification for your intake and ensure that your CBSE and NIOS certificates together satisfy the prescribed PCB + English requirement. Carry both original marksheets/certificates during document verification.