Hello Aspirant,
It will ideally depends on your interest.
If you like science and want to delve deep into the same and go into research or teaching line, then M.sc would be right choice.
But if you believe you can excel in marketing through your skills, then MBA would be right choice.
Last decision is yours.
Good luck

It totally up to there are so many options to may take but my suggestion take what you like most and you not have any idea about that then. Think which types of activity you perform best or you make it at the pro level it also help in your future but the final nail is your choice what you like most.

Good luck