Finance

I would say that MBA in finance prepares you as a general management graduate. Whereas, in the real world, you need to work in a core finance environment. You will be competing against CA's, M.Sc Finance and CFA's. It would be really hard to sustain without lack of core competence. In order to achieve or inculcate this core competence, you should not aim for certifications after MBA but you should do it along with your MBA so that once you get into the real world, you are fully prepared. The most famous certification in the market right now is CFA. With dedication, you can easily clear CFA Level 1 in the college itself. Later on, after MBA, you can go for CFA Level 2 and after some years of experience, CFA Level 3. FRM is another certification which you can look for and there are many more. But I would suggest that you go for CFA Level 1 along with MBA.
Best of luck.