B.Com

You should consult higher authorities for the same if that particular college allows it, you can surely do that.

Yes, you can apply for MBA in bakery and culinary arts. You just need to be a graduate for the same.

It's upto you dear. Both of these courses has equal value in their respect. If you are interested in theoretical knowledge you should prefer B.A(Hons.) and if you are interested in accounts then you should prefer B.Com(Hons.).

Yes, you need to have Maths, as a subject and score the minimum passing mark for hons degree in any college of Delhi University.

Shri Ram College of Commerce
Loyala College
St. Xavier
Christ University
Hindu College
Hansraj College
Symboisis
Amity University.

You should do private B.Com, if you are preparing for CA, as it need lot of self-study. So, doing regular CA is worthless, as you will waste your time and energy in attending lectures. I will not suggest you to drop 1 year of articleship for regular B.Com, as B.Com can simultaneously be done while preparing for CA as most of the syllabus is common.

No, you cannot apply and if you have applied for B.Tech then it would not be beneficial for you.

MA economics is not offered in Delhi School of Economics. Refer the link to know about the courses offered in this college:
https://www.shiksha.com/college/Delhi-school-of-economics-north-campus-50793