Government & Defence Entrance Exam

Hi
For NDA, maths is compulsory in 12th. Please go through the notification provided on the UPSC website to know more. If you are really passionate about NDA then you can also consider it after UG through CDS/AFCAT and a slightly different line CAPF. You can also see this link:
https://www.shiksha.com/exams/nda-exam-results

Hi
AFCAT eligibility
Education : Graduation (min 3 years) in any discipline with min 60% marks and have passed Maths and Physics as subject at 10+2 level B.E/ B.Tech from a recognised University with min 60% marks. Age Limit : 20 to 24 years.

https://ask.shiksha.com/careers/merchant-navy-officer-77
Refer the link.

After your 12th choose subjects from Bachelors of Arts, like Economics, political Science, History, Geography from any reputed organizations. It will help you in understanding the syllabus of the IAS much better than choosing Science or commerce subjects. UPSC can be written by any graduate, but by choosing B.A. In your graduation will help you better in understanding the concepts much easier compared to the other streams. Look for colleges where they provide you extra coaching for UPSC.

Hi Shivam
For NDA (1) 2020: The candidates possessing age between 2nd July 2001 to 1st July 2004 are eligible for the examination. If born before 2nd July 2001 and after 1st July 2004 then not eligible for NDA (1) 2020 exam. Only unmarried male candidates are eligible for NDA examination.

Yes, he can apply for the exam.
For NDA (1) 2020: The candidates possessing age between 2nd July 2001 to 1st July 2004 are eligible for the examination. If born before 2nd July 2001 and after 1st July 2004 then not eligible for NDA (1) 2020 exam. Only unmarried male candidates are eligible for NDA examination.

Minimum 60% is needed in 12th standard.