This depends on what subjects you have taken in your twelfth and what you want to to do. If you are a a science student then the most obvious way would be to go for engineering and then go for a MBA, but if you are a commerce student you can either go for a BCom degree and then a MBA or you can pursue CA and then do a MBA. Irrespective of your background you can get into whichever domain you want to get into. However after a BCom degree the chances of getting into a finance role is higher. If you want to go for consulting then it would be best to get a few years of work experience before going for a MBA.