B.Sc

Yes, you can pursue B.Sc in psychology if you are comfortable with its subjects. It will be good if you look for some commerce oriented degree course like B.Com/BBA/BA which are in-line with your 11-12th courses.

Hello Mohit Kataria,
Kindly, find best institute's list in the link given below:
https://engineering.shiksha.com/bsc-physics-in-india-categorypage-2-64-645-0-0-1-1-2-none-1-0

If you score between 96 to 99.5 percentile you have decent chances. Please check detailed cutoff below.
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653

Biotech is very niche field and has very specific jobs with decent salary. B.Sc is decent but doesn't pay high salaries. B.Tech is highly technical into engineering and offers streams like mechanical, IT, Electronic and telecommunication, Metallurgy, Civil, etc. with high salaries if done from top colleges.

Hi,
You can go for MBA once you complete your graduation, there shall be no difficulty. Start preparing from final year of graduation to appear for the entrances of MBA.
Top colleges have been mentioned in the given below link:
https://www.shiksha.com/mba/ranking/top-mba-colleges-india/2-2-0-0-0