B.Com

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

Taxation for B.Com 2nd year (English) (Paperback)
Paperback
Author: Vikram Editorial Board
E - Commerce for B.Com 2nd year (English) (Paperback)
Author: Vikram Editorial Board

Yes, you can do both at the same time.

Hi,
Please contact the university directly for the information. Only they can guide you in this regard.

Quantum University is the top ranked and best private university in Roorkee, India which offers B.Com and B.Com (Hons) with specialisation in many different disciplines. There are many disciplines students can choose from as per their interest; however all the courses are designed with curricula to greatly meet the requirement of corporate world nationally and internationally.