Dear candidate,
To become a pilot to need to have Physics and mathematics as your compulsory and main subjects in class 12th.
Whether you want to become pilot in Indian air force of a commercial pilot, for both you need to have mathematics in class 12th.
You need to score atleast 50% with physics, chemistry and mathematics in class 12th.
Then you need to gain a commercial pilot license from any reputed flying schools in India.
I hope this helps.
All the best for the future!!