Good to see that you are taking up MBA as well as preparing for it. To begin with, MBA is not just one single course but comprises of several specialization courses under it. Some of them are :
Supply chain ManageMent
While each specialization course has a different set of subjects but a few of them are common to them.
Principles of Management
Accounts and finance for Managers
Production and Operations Management
Multinational financial Management
Finance Markets & Services
Working Capital Management
Security Analysis & Portfolio Management
Hope this helps and for detailed list of subjects you can search for that particular specialization course.