B.Sc

The university or college may not be offering that specific programme in the particular academic year.

Hello,
Admission are open for B.Sc Agriculture.
Agriculture is a 4-year professional undergraduate degree awarded by Indian Universities for 10+2 students preferably with Science stream. The basic eligibility criterion for pursuing this course is that the student must have passed 10+2 with at least 50% marks.
Click on the link to apply:-https://www.doonbusinessschool.com/programs/sciences/b-sc-agriculture.html
Thank you.

Both are good options, but according to me industrial chemistry has good scope and placements are good.

It depends in some college, it is necessary, but there are some where it's not necessary. You have to check with individual colleges for that information.

70-90k p.a for BSC PMC Reva University.

Your chances are pretty high as your profile seems very strong. Most probably you'll get an admit for sure. All the best!

Yes, you are eligible for B.Sc Mathematics.

Yes, you are eligible for B.Sc Biotechnology.

https://studyabroad.shiksha.com/canada/be-btech-in-computer-science-engineering-colleges-ds
check out this link. And, also check for eligibility criteria laid out.