Hii Souvik!!
There are a no. Of courses in India which can be joined to become a pilot after completing class 12th. Some of them are -
* Student pilot license training - six month course
* Private pilot license - one year duration course
* Commercial pilot license - 3 year course.
You need to be a 12th pass with minimum 50% marks in PCM combination for availing this course.
Some of the colleges offering pilot courses are -
* Indira Gandhi rashtriya Uran academy, Rae Bareilly
* Government aviation training institute, Bhubaneswar
* Government flying club, lucknow
* Rajiv Gandhi National flight training institute
Etc.,
Hole this helps.
Good luck!