Hello Umair

NDA Eligibility Criteria is given below-

Nationality: A candidate must either be (i) a citizen of India, or ii) a subject of Bhutan, or (iii) a subject of Nepal, or (iv) a Tibetan refugee who came over to India before the 01st January 1962 with the intention of permanently settling in India, or (v) a person of Indian origin who has migrated from Pakistan, Burma, Sri Lanka and East African Countries of Kenya, Uganda, the United Republic of Tanzania, Zambia, Malawi, Zaire and Ethiopia or Vietnam with the intention of permanently settling in India.

Age Limits: Only unmarried male candidates born not earlier than 02nd January 1999 and not later than 01st January 2002 are eligible.

Educational Qualifications:

(i) For Army Wing of National Defence Academy: 12th Class pass of the 10+2 pattern of School Education or equivalent examination conducted by a State Education Board or a University

(ii) For Air Force and Naval Wings of National Defence Academy and for the 10+2 Cadet Entry Scheme at the Indian Naval Academy: 12th Class pass of the 10+2 pattern of School Education or equivalent with Physics and Mathematics conducted by a State Education Board or a University.

Under NDA Physical Requirements, the minimum acceptable height is 157.5 cms for Army and 162.5 cms for Air Force. There are a few exceptions set according to the region of the candidate. (Source : UPSC)