Hello,

You have to decide very carefully and you have two options:

1. If you are very sure that you will be going in the banking sector no matter what then you should do your graduation in accounts or economics. You can start preparing for the RBI and other baking related exams. 

2. If that is not the case then you can go for an engineering degree as you can get into good placements in banks if you complete your engineering from a good college.