what is the eligibility criteria for CDS-2013 Eligibility Criteria?

CDS Exam
The eligibility criteria vary for the various departments and candidates have to go through this before filling the application form.
For IMA and OTA: Degree from a recognized university- Age limit 19-24 years
For Naval Academy: Degree in engineering – Age limit 19-22 years
For Air force Academy: Degree from a recognized university with physics and mathematics in 10+2 or a bachelors’ in engineering – Age limit 19-23 years