B.Sc

Hi,
B.Sc colleges available for you are:
Loyola College, Chennai
Christ University, Bangalore
St. Xavier's college, Mumbai
I would prefer you to take the lateral admission in engineering as you have good grip over mechanics and can join by omitting one year.

Please refer to the link provided below for course details, scope, etc. for B.Sc. Agriculture and B.Pharma:
1) B.Sc (Agriculture): https://www.shiksha.com/science/articles/bsc-in-agriculture-course-career-scope-and-salary-prospects-blogId-14705
2) B.Pharma: https://ask.shiksha.com/getTopicDetail/1091463/what-is-the-scope-of-b-pharma-in-future-prospects-which-is-the-best-college-to-do-b-pharma-in-up-is-kiet-is-good-or-not-plz-tell-me

You should check with the university/institute you have applied to, for counselling dates.

Hello Riya
B.Sc Biotechnology is a good option for you as it has more good options and more scope in future.
For college details please visit the link provided:
https://www.shiksha.com/science/colleges/biotechnology-colleges-india

You will have to check with the college where you are planning to pursue this course.

Your question is a little unclear. As far as I understand, you are asking whether B.Sc in Maths, Statistics and CS equivalent to Bachelor of Computer Science. Well, I don't think they are equivalent. Very rare colleges offer Bachelor of Computer Science. Most colleges offer BE or B.Tech in Computer Science which is different than B.Sc in Computer Science.

Hello Kuldeep,
No, you cannot. You need to have a M.Sc degree after B.Sc to become eligible for GATE exam.
Only BE/B.Tech graduates are directly eligible for GATE exam.