B.Sc

Hello Rani,
The admission process in OU has already begun. Go to the admission office of the university. Kindly refer the following link:
https://dost.cgg.gov.in/

Dear MD,
The basic eligibility criterion for pursuing B.Sc. (Information Technology) degree is qualifying 10+2 or equivalent examination in Science stream with maths, physics and chemistry as subjects studied and with a minimum of 50% marks secured in Maths and/or in aggregate from a recognised board of the country. If you meet the above requirements, you can take admission in any college in India.

Dear Ashwani,
Refer the below link of top 10 colleges in India for computer Science studies. The college or university Mentioned in the link are ranked on the course, education, placement records and student life at the campus.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/science/articles/amp/top-10-bsc-msc-colleges-in-india-blogId-13473&ved=2ahUKEwj8tMaitsriAhWTWX0KHd0rCHUQFjAQegQICBAH&usg=AOvVaw0_ZlgVpYuXNmrDCwDxBC9D&cf=1.

Dear Pradyumn,
Yes, you can pursue B.Sc physics. B.Sc physics is an undergraduate programme, the minimum eligibility for which is an intermediate 10+2 in science with physics, chemistry, mathematics/biology and English as compulsory subjects.

Dear Smiti,
Please check the below link for B.Sc. Geography Honours colleges in Kolkata.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/humanities-social-sciences/geography/colleges/colleges-kolkata&ved=2ahUKEwjXrcn_r8riAhUk6XMBHct4DacQFjAFegQIBhAI&usg=AOvVaw0NewZRVWEyOEH30Ospp70F&cshid=1559463988407.

Yes, you can apply for B.Sc Mathematics in the asked college. The admission are based on merit (12th marks).