Dear student,

If you are pursuing physics chemistry and biology as your main subjects and in optional you have mathematics as your subject, then yes, you can become a pilot after passing your class 12th exams.
For becoming a pilot you must have :-

Good IQ and Problem solving skills
Physical Fitness
Good decision Making Skills
Good Eyesight
Good Communication Skills

And then complete your study with some of the good institute of India offering pilot course like :-

Indira Gandhi Rashtriya Uran Akademi, Rae Bareli

Government Aviation Training Institute, Bhubaneswar

Government Flying Club, Lucknow

Orient Flight School, Chennai

Puducherry Thakur College of Aviation

Institute of Aviation and Aviation Safety

Rajiv Gandhi National Flight Training Institute