To join a defence academy like NDA, IMA, or OTA, candidates must meet specific eligibility criteria. For NDA, applicants must be male, unmarried, and between 16.5 to 19.5 years of age, having completed or appearing in Class 12 (with Physics and Math for Air Force/Navy). For IMA and OTA through CDS, a graduation degree is required. Candidates must be Indian citizens and medically fit as per military standards. A clear understanding of these criteria is essential for aspirants, and guidance from the best defence coaching in India ensures accurate information, timely application, and focused preparation. Top institutes provide updated eligibility alerts, application support, and expert mentoring, making them crucial partners in your journey to joining the armed forces.