Hello nitin

Combined Defence Services is conducted twice a year by UPSC.Age limit is as follows

Indian Military Academy 19-24yrs

Indian Naval Academy 19-22yrs

Air Force Academy 19-23 yrs

Officers Training Academy -19-25 yrs

You are eligible for officers training academy. For officers training academy the candidate born not earlier than 2nd july 1995 and born not later than 1st july 2001 is preferred.

Go through the details regrading the eligibility criteria before application.