Hey Arpita....

Below are the few of the top courses choose by students after 12th from commerce : 

• Bachelors of Commerce (B.Com)
• Bachelors in Economics
• Bachelors of Business Administration (BBA)
• Bachelor of Management Studies (BMS)
• Chartered Accountancy (CA)
• Company Secretary (CS)
• Cost and Management Accountant (CMA)

As for the part of which course to select from these are the other available it totally depends upon your choice and your interest in that particular subject that you will graduate from. if you are well versatile in that subject or in your graduation course then it won't be much hard for you to get placement in any course