The correct option is C Functional commands have to maintain all aircrafts and ensure that they are ready for warfare.
The prime responsibility of the Air Force is to secure the Indian airspace and conduct aerial warfare during times of conflict.
The Air Force is divided into seven commands as of 2020. Among these, five are operational commands, and it is their task to hold military operations using aircrafts within their area of responsibility. The other two are functional commands, and they maintain all aircrafts and ensure that they are ready for warfare.
The two important training centres are located in Bangalore and Hyderabad.