Giridhar, for you to stud any of the Biology stream subjects after your 12th, you should have completed your 12th in Biology. Here 12th is Intermediate equivalent. Now in MPC you study Mathematics and for studying any Biology related subjects in your Graduation like Botany, Zoology, Life Sciences, you need to study Biology as your core subject in your 12th i.e. Intermediate. But, if you choose to study B.Pharmacy, you can. Because to be eligible for studying B.Pharmacy, you should have completed your 12th in Physics, Chemistry and Biology/Mathematics as your core subjects. That is one option that you have. But for other options like MBBS, BDS,Ayush or Veterinary sciences of even Paramedical courses, you will have to have studied Biology as a core subject. So B.Pharmacy might be an option that you have. CBSE has released a list of subjects and courses one can study after 12th and you can check that at our page: https://news.careers360.com/cbse-releases-list-compendium-courses-students-pursue-after-12th