NDA

Hi
You need to focus on Maths and English because it's the NDA paper 1 and paper 2
1 Maths
2english
If you focus on before 12 then you get good score In 12 also and it's good for exam prospect also
For NDA student must have Physics Chemistry and Maths as subject in 12th. NDA examination is conducted by UPSC. Students appearing in 12th are also eligible. How to Prepare for NDA Exam after 12th
Understand the Syllabus and the Subjects : Initially, when you start preparing for the exam, understand the syllabus and the subjects. Practice Managing Time
Solving Question Papers
Avoid Guessing Game
Focus on the Language
Be Updated
Stay Fit and Healthy.

Hi
According to the official NDA 2 2022 notification, which was published on May 18, 2022, both male and female applicants who are single and were born between January 2, 2004, and January 1, 2007, are eligible to sit for the exam. NDA exam was conducted by UPSC and it's twice in a year exam conducted every student who pass 10+2 is eligible for exam but if you pass 12 without physic and Maths then you only eligible for army and if you pass with physic and Maths the you have a chose to choice it
Exam pattern is 2 paper conducted on same day
Paper 1 is Maths
Paper 2 is English negative marking is applicable on exam
You need to crack written exam then you eligible for ssb interview of 5 day interview after your interview you go for training and then you conduct in service.

Target Defence Academy, Kapoorthala, Lucknow. Tara Institute (Delhi, Mumbai, Gaya, Jabalpur and Dehradun)
Baalnoi Academy (Delhi, Jaipur and Dehradun)
General Ranjit Academy, Gurgaon. Doon Defence Academy, Dehradun. NDA Preparation Tips 2023
Be consistent with your study plan. Devote few hours every day to study the syllabus thoroughly. Revise your notes and important formulae every day. Practice practise mock tests and previous years' question papers to get familiar with the exam pattern and syllabus. NDA Preparation for Maths
Practice, Practice In a subject like Maths the more you practice, the more you will get better. Polish Your Concepts Use beginner-friendly Maths books to revisit fundamental concepts. Use an Audio-Visual Study Approach. Practice solving previous years' papers and mock tests.

Hi
NDA stands for the National Defence Academy exam. NDA is conducted by UPSC. UPSC NDA is the national-level examination which is conducted to recruit qualified candidates as officers in the Indian Navy, Indian Army and Indian Air-force. After completing the training, the candidates get the rank of Lieutenant and work at the same salary
The entry through NDA is open for Flying branch, Ground duty (tech) and Ground duty (non tech). All cadets of Flying branch and Ground duty (tech) would be offered B Tech in NDA and cadets of Ground duty (Non-tech) would be offered B.Sc. Degree. The fee for NDA training, including accommodation, books, uniforms, boarding and medical treatment, will be borne by the Government. Parents or guardians of cadets will be required to meet their pocket and other private expenses. Normally, these expenses will not likely exceed INR 3000/- Per Month.