Hello,

Commerce students are eligible to apply for NDA army after 12th. But  For Air Force and Navy the candidate must have passed 12th with physics and maths as subject combination .As per the eligibility criteria you must have completed your higher secondary examination 12th standard in any discipline from recognized university board. You should also meet the age limit criteria specified. The NDA exam is conducted by UPSC. The syllabus of the exam consists of two sections- Mathematical Ability and General Ability. The questions in NDA 2020 will be asked from topics and concepts of 10+2 level.

Hope this helps you.