Candidates for AFCAT must have completed their 10th and 12th grades with 60% in Math and Physics.
For INET, candidates should have a minimum of 60% aggregate marks in the 10th and 12th classes.
In order to be eligible for OTA CDS, one must be an engineering graduate from a recognised institute with physics and math as compulsory subjects in their 12th grade.

For more information on AFCAT, you can check out this link below:

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