B.Com

As you had Maths as subject in 10+2 you are eligible to seek admission in MCA on completion of B.Com degree.

Both have an equal scope. You choose for any between DU & GGSIPU. And both B.com & BBA have also equivalent scope.

Your next stop depends upon what do you wish to do further. Whether you wish to study or work. You may have a look at the below link and then decide your career:
https://www.shiksha.com/accounting-commerce/articles/course-options-after-b-com-blogId-12939

For long term career growth, MBA is a better option. If you do not have any personal constraints, then you may opt for MBA over Diploma in banking & finance.

An aggregate 40% marks in the qualifying examination. The merit shall be determined on the basis of one language and three best elective subjects.

Most of the commerce pass outs go for graduation I.e. B.Com or BBA along with any professional course I. E. CA, CS or CMA.
It's always good to start both simultaneously to save time.
Moreover by the end of the duration you have two degrees at your disposal which is an advantage.
You can go for CS or any other professional course alone too. But, since those are not considered graduation degrees, going for a B.Com is essential.
Think wisely.
All the best.