Science

Yes, you are eligible. NEST (National Entrance Screening Entrance Test) is a national level entrance for students seeking admission to 5 year Integrated M.Sc Programme in Basic Sciences Biology, Chemistry, Physics and Mathematics. NEST 2019 will be jointly conducted by NISER, Bhubaneswar and UM-DAE CEBS, Mumbai. Applicants must have secured minimum 60 % for General category and minimum 55 % for SC, ST, and PD category in 10+2. Further, candidates must have Mathematics as the mandatory subject on 10+2 exam.

Yes, you can definitely do. But, why are you restricting yourself to just Pharma MBA? Have you checked out the opportunities of Pharma MBA, if not, please check once. I am also a B.Sc graduate with exactly the same subjects a yours. I am pursuing PGDM in marketing from BIMM one of the best college in Pune with Maximum ROI. If you need any help regarding specialization, then contact me. But, I would advise you to go through all the specialization first before opting for anything.

Yes, you can, because you should have 3 main subjects out of PCMB. So, if you don't have Maths still you can apply. Good luck.

Yes, you can do B.Sc in agriculture.

https://www.shiksha.com/bba/colleges/bba-colleges-kolkata.