Science

No, to do M.Sc you have to first complete your graduation. After class 12th you are not eligible for M.Sc.
Good luck.

You need to have 95%.

For which category?

Please use given link for list of good colleges
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/science/colleges/b-sc-colleges-west-Bengal&ved=2ahUKEwieguWj-73iAhWmgUsFHd6NBwgQFjAEegQIBBAB&usg=AOvVaw1M3PH0bDHz6rc-0N4ixZxD.

You can get Master’s degree as well as you can also Ph.D after completing your B.Sc HS course.

I have seen the one of the worst university in my life is PDM. There are no proper equipment in their labs and faculty also not. I left the college. They also have M.Sc Microbiology course, and they don't have a lab for microbiology. So, don't think about M.Sc. But, PDM University is good for B.Tech

Yes, you are eligible because the criteria is PCB with 55% aggregate. Some universities offer direct admission when other prefer to take entrance test. Some good universities are Indira Gandhi Institute of Medical Sciences, Sharda University etc.

Hello Chandana,
You may use the college predictor tool to know your chances of getting agriculture colleges with your KCET rank:
https://www.shiksha.com/b-tech/resources/kcet-college-predictor

Yes, minimum eligibility is 50%, but it again depends upon the institution you have choose that can only be done by you and then search the same accordingly. All the best.

Yes, minimum eligibility is 50%, but it again depends upon the institution you have choose that can only be done by you and then search the same accordingly. All the best.