Hey in my opinion commerce is best choice if you wish to be in a field of business, finance, management and all. Commerce is chosen by most of students who wish to stay in field of business, entrepreneurship etc. Commerce deals with subjects like economics, buisness,accountance etc. So if you want to be a business or to do start up taking commerce stream will help you more. But that doesn't mean that science students can't start a buisness. We can see many successful business person were either college drop out or people from different stream . Any successful entrepreneur needs a technical  and management skill. For getting an idea on business plans, courses like MBA and all help more.