Pilot

Hello Yashika,
It's good to see you're looking forward to become a pilot. First of all, just focus on your boards and try to score above 60%, and then if you get time during your 12th, I would suggest first of all undergo your class 2 medicals, it won't take much time, about 5-6 hours depending on the hospital. After completing the medicals you have to join the flying schools here is the list of them in Bangalore.
1) Hindustan Aviation academy
2) Government flying training school
3) Bangalore aviation academy
The minimum fees is around15-20 Lacs. Hope this helps
All the best.

There are no pilot courses in India.

Hello,
None of the degrees you mentioned are required to be a pilot. To become a pilot you should join a flying institute, gain license and increase flying hours. All the best. If you find this helpful do give an upvote.

You can choose CPL for best jobs. Coming to question, there are many training institutions, which are approved by DGCA in India. You can select one of them.

To get eligible for the course, the candidate must have passed Higher Degree in Physics/ Mathematics/ English with a minimum of 51% marks. Please confirm the same from the college authorities for detailed information.

To become a pilot, you need a Bachelor's degree in aircraft operations, aviation, aeronautical engineering, or a related field. In addition, you will complete up to two months of ground training and need more than 1,500 hours of flight experience.

Well, you are not eligible for NDA, the option left with you is CDS examination for which you need to do graduation. And after clearing that, you need to undergo training in AFA Hyedarabad. After which you become a pilot in Indian Air Force.

I am happy to see your interest in Air India.
Go through the following article of mine and I assure you all your queries shall be automatically answered.
https://www.google.com/amp/s/www.shiksha.com/aviation/articles/amp/so-you-want-to-be-a-pilot-blogId-18537
Any further assistance if required is most welcome.