Commerce

It is not mandatory for MBA courses, but it will be a value addition for you in placements and will help you to grow faster than other students. If you want to do for MBA learning then it is not needed because these courses are advanced courses first you should know the basics of business. You can do these courses in the second year as well or after completing MBA.

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Yes, you can apply for the exam.

Yes, you can.
This is the eligibility
Education : Graduation (min 3 years) in any discipline with min 60% marks and have passed Maths and Physics as subject at 10+2 level B.E/ B.Tech from a recognised University with min 60% marks. Age Limit : 20 to 24 years.

You have plenty of options. First, you have to define creativity. And, depending on that you can choose a course.

Yes, you can apply and your chances are also a bit good for DU.

There are various Commerce degrees such BBA MBA, CA CS CWA, B.Com and many more in demand, if you have good knowledge in that field.

Of course they take a test on 10th basis.

Yes you can apply for the exam.