Hi Dilkhush,

I think you will understand Hinglish better, so I am answering in that only.

Aapka chota bhai Air force and Navy  ki tyari krna chahta h, toh yh dekh lijiye NDA Exam ka Air Force and Naval Wings me jane kle liye eligibility criteria:-

Eligibility criteria yh kahta h ki yadi koi student 12th pass h or uske paas physics and maths subjetcs the to vo NDA ke lie eligible h.

Ab aap ye kahenge ki in dono ke liye to alag se exam hota h, ha ek exam alag se bhi hota h par NDA Exam dekar aap kisi bhi force ko join ke skte h. Form bharte vaqt usme aapki preference puchi jayegi jo ki aap Air force and Navy bhar dena.

Aap to bhas apne bhai ko tyaari karaiye.

Refer here for more info - https://competition.careers360.com/articles/nda-eligibility-criteria

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!