Dear Kushal, there are 2 things to it. Now MBA admissions are conducted through entrance examinations like CAT, MAT, XAT, SNAP, ATMA, etc and these entrance examinations do not specify a specific stream in Bachelor's degree as a stream. So, there is no rule that you should do a particular course in your Bachelor's degree to be eligible for these entrance examinations. So you have academic liberty there. Next, what you want to do in MBA should complement what you want to do after MBA. It might not necessarily mean it should complement your Bachelor's degree. But if you haven't joined your Bachelor's degree yet,we would like to suggest you to take the unconventional path. There are points that are given for Academic diversity in your application. So you should have a academic path which gives you a upper hand over your peers. This means, you need to take up a professional course like CA, CS, Journalism and Mass Communication, etc. These complement your Commerce Background in 12th and also help you gain few points on Academic diversity scale. And post MBA, you can take up MBA Finance, MBA Investment banking, so on and so forth.

dear student after complete your 12th standard if your aim to do MBA then you have to do BBA OR B.COM (//B.COM) course because in this course you learn various skills related to MBA so your 1st preference to do BBA then optional course is B.COM (//B.COM) ..

thank you all the best