B.Com

Hi Gunjan,
All the institutes offering a Masters program in interior designing generally have a common entrance test that assesses your quantitative aptitude, reasoning ability, English language and general knowledge. Thereafter, some institutes might conduct creative aptitude tests which generally includes drawing tests and portfolio. Since you are already pursuing a Diploma in interior designing, it should not be difficult for you to clear creative aptitude test.

Good morning dear,
There are many institutes which accept MAT score above 50 percentile but the second qualifier is minimum 50% in graduation.
But there are many institutes that accept this as well.
Refer to the link below for complete details and list of colleges. You may find few for you.
https://www.shiksha.com/mba/colleges/mba-colleges-accepting-mat-india?rf=filters&ts=21861600&ex[]=306&ed[]=et_20&uaf[]=et_dm&uaf[]=exam&uaf[]=location
Thanks and all the best.

Good morning dear,
Please refer the below link for the complete details regarding the course.
http://www.sxccal.edu/departments/BComMorning/BComMorning.htm
Thanks and all the best.

Both have more or less a similar curriculum, so for whichever course you're getting a better college, go for that. From an MBA point of view, both BBA and B.Com grads are viewed similar.

Hello,
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india/2-2-0-0-0
Kindly visit this link to know about the top B-Schools in India. Hope it helps!