Hi aspirant,

NDA examination conducted by UPSC for entry to Indian armed forces, Indian Air forces and Indian Navy through the National Defense Academy, Pune. It will not matter whether you fiil your OBC certificate or any other certificate as there is no reservation in the prestigious Institute. All the candidates are considered equal only the fittest and best individuals qualify into the forces. The examination is completely merit based and is held two phases which are written and SSB interview. The eligibility of candidates is determined based on multiple factors like age, educational qualification, physical standard, nationality the details for which can be found on the link below: https://competition.careers360.com/articles/nda-eligibility-criteria

Hope it helps!!