Which course should I pursue among BBA and B.Com to go for MBA?

You can pursue any of them. Both are eligible but if you want to pursue MBA in finance, you have to opt for B.Com as you want to have accounts in it or else you can go for BBA.

Both the options are good. It depends on the specialisation also you want to opt for. If you want to pursue MBA in finance then B.Com would be preferable, otherwise, for other any other MBA specialisation, you can pursue BBA.