Dear Chinnu, there is no specific quota for NCC/Sports in AFMC. In page 20 of https://www.afmc.nic.in/admissions/AFMC%20MBBS%20Information%20Brochure%20%202019.pdf, the rule says that Candidates need to submit the original copies of NCC,Sports and extracurricular activities "If any". So it is not mandatory to submit these certificates and if you do not have them, your admission will not be held back.