MBBS

You can pursue MBBS + MD + MS to get a high salary package.

Getting an entrance is important. if you have some other option, please write it. Else you should take this college.

If you want to study in West Bengal, you have to prepare well & try for better institutes next year because you must score a rank under 2000 if you want a good medical college there since the private medical institutes in West Bengal are not good for studies.

Some of the best options include:
Sun Yat Sen University
Zheijiang University
Huazhong University
Beihua University
Jilin University
China Medical University
These are the best options for MBBS, you need to spend around 25 L to 32 L there.

MBBS is a six year program in UK which comprises of Foundation and Specialty Training. For science students, the duration could be of five years. Tuition fee is around British Pound 20,000 to British Pound 37,100 for international students. Living is expensive in UK and will largely depend on your lifestyle and accommodation. To study in UK, you must require at least 1,265 per month. This is the amount you must show when you are applying for the Tier 4 / student visa to UK as per UK Visa and Immigration (UKVI).

You need to qualify USLME to study further after MBBS or to work in the USA.

According to me, you should opt for M.Sc as you have opted B.Sc in UG.