Hello Aditya,

The age limit for NDA is 16.5 to 19.5 years. Now you are 17 years 9 months. According to NDA 1 the eligibility criteria is that the candidates must have not born earlier than July 2, 2004 and should have not born later than July 1, 2007. Your date of birth does not fall in this range. You are not eligible for NDA I 2023 means obviously you'll not be eligible for NDA II 2023. So you are not eligible for both NDA I & NDA II in 2023. Hence you are not eligible for 2023 NDA.

For Indian Army the eligibility criteria is that candidates must pass 12 th standard from a recognised Board.

For Indian Air Force the education qualification needed is that the candidate must pass 12 th standard with Physics from a recognised Board.

Click below link for more information about Eligibility Criteria for NDA.

https://competition.careers360.com/exams/nda

Hope this helps.