Biochemistry

B.Sc Optometry is degree in clinical skills involved in professional measuring eyesight, prescribing corrective lenses and detecting eyes diseases. You can opt in private and government sector in different areas i.e eyes clinic, optician, contact lenses and ophthalmologist, hospital eye department. While if you choose B.Sc Biochemistry, thaen you can work in private and government sectors, hospitals, government agencies, social and nonprofit organization as a biochemist And in pharmaceutical companies also.

Hey Krishna,
Yes, you will get a seat in BHU as you've got the quota of OBC which will help you in securing your seat as there are 58 seats available for the OBC category candidates.

Yes, you have a very strong chances of getting admission.

Yes, your percentage is good enough to get admission here. You can apply for admission. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Good luck.