Good day aspirant!

There are many colleges in India for Science stream students

1. IISER/ IISc- You can opt to do a BS MS in IISERs/IISc. The coursework is extremely focussed on research and will help you get a PhD abroad to pursue your research interests. You can get admission bia your JEE advanced ranks/ KVPY rank / SCB rank. SCB exam is conducted every year and to write the exam you have to have a certain percentage of marks in your board exams.

IISER admission website (http://www.iiseradmission.in)

2. You can do a BSc in any university like MSU, DU and then look at what interests you to pursue your interests further. The application acceptance will be based on your board exam scores.

Hope I have answered your questions