NDA selects candidates mainly for the two wings i.e., Indian Army & Indian Air Force and Naval. The eligibility criteria or this wings are provided below:

As you can see you need to qualify the 10+2 examination, so with Diploma after 10th you are not eligible for the examination.

For more information regarding NDA consider the link below:

https://competition.careers360.com/articles/nda-eligibility-criteria

I hope this helps. Wish you a great eve!

• Candidate should have completed 12th or equivalent examination with maths and physics. Polytechnic students are not eligible for NDA.
• You can also check the below link for your further reference https://competition.careers360.com/articles/nda-eligibility-criteria