B.Sc

from my side it will be from bsc with biology because with interest in study and good scope in biological field remaining ur dicesion

hii.if u want to change field u have to process further on basis of 12 th ,u think u like medical or engg medical having so many scope ,opportunity ,salary in futere and subject also not so tufff. best of luck.

Dear Candidate
You can try for B Tech at University of Calcutta (Rajabazar Science college Campus), M.Sc, Radiophysics
You can try some courses at BITS, Meshra, Kolkata Campus

Physical Science

yes it is possible search agricultural college, procedure and apply

early June and late may in most of the colleges

if you meant chemistry, botany and zoology, I must say you to complete masters (m.sc) in zoology. That will be easier to go for you

Manbeer, PAU is one of the best universities in India but for admission there you need to clear an entrance test. If you have given the test wait for the counseling and admission result. You can also try for admission in Punjabi University, Patiala. In case you have not given any test then route towards private institutions that are offering B.Sc agriculture.
They all are UGC approved. Some of these institutes also offer scholarships to students.

b- tech ,bsc it does not so many opportunity