hiii there

ofcourse you can leave your your bpharma in middle of the year. It doesn't matter in which year you are, you can quit whenever you want. you can quit B Pahrma after 1 year, there is no issue with government colleges but private college will ask you for remaining 3 years of fees as college will be loosing their candidate for next three years fees, and they will not provide your documents easily.

and take admission in MBBS but be sure that you have sufficient documents and required certificate to get admission for MBBS.

hope this is helpful for you

best of luck