Hello Aspirant,

Right now you are not eligible for CDS although your age is 21 years but for CDS you should have completed your bachelor's program and you have started it now so one you complete it then you can check whether you will be eligible or not with your age at that time.

For your reference the age criteria for different courses is mentioned below :-

>> Indian Military Academy - 19 to 24 years

>> Indian Naval Academy - 19 to 24 years

>> Air Force Academy - 20 to 24 years

>> Officers' Training Academy (Men) - 19 to 25 years

>> Officers Training Academy (Women, Non-Technical) - 19 to 25 years

Apart from the age criteria there are some other parameters upon which your eligibility will be determined like your educational qualification which goes like :-

** Indian Military Academy - Bachelor's Degree from a recognised University or equivalent institute

** Indian Naval Academy - Bachelor's Degree in Engineering from a recognised University/ College

** Air Force Academy - Bachelor's Degree from a recognised University (with Physics and Mathematics at 10+2 level) or Bachelor degree in engineering

** OTA (Men) - Bachelor's Degree from a recognised University or equivalent institute

** OTA (Women - Non-Technical) - Bachelor's Degree from a recognised University or equivalent institute

For detailed eligibility criteria kindly check out the link given below :-

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

I hope this information helps you.

Good Luck!!