Delhi

If you want to do B.Com (hons.), then it's not compulsory to take math in 12th.

You just need to go to GGSIPU and talk to the academic coordinator regarding this issue. I know they will surely rectify your query but i am not getting one thing you must have filled the preferences or choices that's why you have got this. without your preferences they can't give you.

Yes you are eligible and shall appear for entrance exam like CMAT, MAT, CAT, XAT, SNAP. Although it is advised to go for full-time MBA programme for better paying jobs. I am sending you list for distance MBA in Delhi below.
https://www.shiksha.com/mba/colleges/distance-correspondence-mba-colleges-in-delhi-ncr

Dear Akash,
Since you talking about best in study and placements then it's only FMS University of Delhi. Apart from this there are others as well such as
IMI
MDI
DOM- IIT Delhi
DOM- South campus university of Delhi
Amity Noida
BIMTECH

Dear Anjali,
See if you want to pursue MBA correspondence I won't suggest any of colleges which you mentioned I would suggest in this case Narsee monjee, it's distance MBA is also reputed and valuable to pursue.
All the very best

Dear Gokul,
All colleges under university of Delhi are having reasonable fee for B.Com Honors, but for getting admission one must have minimum score of 90% in 12th
All the very best.

If you want to do MBA then Faculty of management studies, Delhi university and Amity business school-Noida, GGSIPU would be better option for you. choice is yours.