Hello Goswami

IAF provides opportunity for airmen with minimum 10+2 educational qualification and below the age of 27 years to become commissioned officer in Army through Army Cadet College Course. The eligibility candidate has to pass the written examination conducted by Army HQ. On passing the exam they were interviewed by SSB. If selected, Army HQ details the candidate to undergo the ACC course at IMA, Dehradun and on completion of the course at IMA, they are granted commission in the Army.You should also check out these links they will help you more

https://competition.careers360.com/articles/afcat-eligibility-criteria#:~:text=Candidates%20with%20a%20minimum%20of,to%20apply%20for%20the%20exam.

https://news.careers360.com/indian-air-force-afcat-notification-2020-released-check-eligibility-criteria

https://competition.careers360.com/articles/how-join-indian-air-force

Hope this helps you