B.pharm

Yes, you can take admission in MBBS after completing class 12th or after completing your graduation, but there is no advantage of doing B. Pharma, and then MBBS. Neither your experience nor your degree of B.Pharm will have worth once you do MBBS.

To pursue B.Pharmacy, you must have completed either D.Pharm or class 12th science stream.

At B.Pharm level, you won't be able to work as scientist. You have to do post graduation in one of the specialised subjects in Pharmacy.

You can select the career in marketing, pharma industry, clinical research and higher education like MBA or teaching in D.Pharmacy college.

According to me, BHMS is a better option.
After the completion of BHMS, you may find employment as:
-Homeopathic practitioner in both India and abroad.
-Medical representative at a private or government hospital.
-Professor or a researcher in any homeopathic college.
-You may start personal clinic.
-You may setup retail shop of homeopathy medicines.
-You may work in industries dealing with homeopathic preparations.
-You may start your own pharmacy.
-You may work in public and private sector.
-You may work in private or government hospitals, clinics, NGOs, etc.

You can take MBA in pharmaceutical management.

Dear Aishwarya,
You can go for MBA in pharmaceutical management. It is very much suitable for you. Specialization like production and operations management, marketing and HR anyone you can take for your career.
All the best.