Hey Sukhbir,

For your information National Defence Academy conducts it's entrance exam through UPSC twice a year and it is common for all streams, Arts, Commerce and Science but Arts and Commerce students would not be allowed for Air Force and Navy academy. Syllabus remains same for all the branches, where you have following sections:

• Mathematics
• English Ability
• General Studies

And to know all about NDA examination, syllabus, pattern follow the link; NDA Exam

Thank you