Hello

Eligibility criteria for cds exam 2021 age wise is :

For airforce :  a candidate age should be in between 19 -23. The candidates that is below 25 must be unmarried. Above 25 can also apply but they didn't get any married accommodation and they can't live with the family out of the premises

For navy :19 to 22 unmarried

For army :19 to 24 unmarried.

You are eligible for the same

Good Luck