Hey Ayush,

If you really want to do a BSc course then go for Agriculture rather than biotechnology. BSc Agriculture is a 4 year course and it will give you better opportunities and job exposures. If you really wanna study biotech or biochem then go for the B. Tech one rather than  BSc. B. Tech has a wide range of subjects that will help you in your career.

In case of d. Pharma, I will suggest you to do it after a bachelors. It will help you get a greater practical experience as a result more job opportunities.

Hope this helps!