Science

Admission is through university level online counseling based on the rank obtained in Banaras Hindu University Postgraduate Entrance Test (BHU-PET). Best of Luck.

Go for it. Here is a list of good colleges which offers a good opportunity for you.
https://www.shiksha.com/engineering/colleges/diploma-courses-india

Hi, Most institutes offering the course admit students based on their performance in a relevant entrance test followed by a round of Personal Interview. Admission process generally varies across institutes. Please confirm the college name in which you which you wish to apply. Regards.

Please visit the link for details: https://www.shiksha.com/science/course/m-sc-in-mathematics-school-of-distance-education-university-of-kerala-thiruvananthapuram-298822

Yes, you are eligible to apply for this course.

They ask your field of interest, say whichever subject in which you can answer questions easily. If you have good marks in academics, that will be a plus point.