B.Com

There is no issue with B.Com as much of its syllabus is same as in the CA. So, he has to join CA directly without wasting any time. Otherwise he can pursue for B.Com simultaneously with CA.

No, minimum 55% marks is required for commerce background.

Every candidate, who are declared 'pass' in Professional Programme Examination in addition to acquiring practical experience, shall be required to undergo compulsory practical training for four months. Read More: ICSI CS Result 2019; Girls outshine boys in the Foundation Programme.

It will add your best of four and it is not mandatory to add maths marks.

NMIMS is one of the best colleges for B.Com (Hons) and B.Sc. Finance but amongst all them, NMIMS Mumbai is the better option.

https://www.shiksha.com/university/du-delhi-university-24642/admission
Here is the complete admission process to get admission in this university.

https://www.shiksha.com/accounting-commerce/colleges/b-com-colleges-india
Here is the list of the top colleges in India for B.Com. You can get all the updates like admission procedure and eligibility criteria.

https://www.shiksha.com/b-ed-chp
Here is the blog which you can refer.

BBA & BBM are related to management aspects whereas B.Com is about commerce and finance. Now, it depends on you to choose a field that you are most interested in. You can go either for BBA or BBM in case you desire to get job in management line or B.Com for jobs related to finance, CA, ICWA etc.

Hey,
Just go through this link and fill out the required details:
https://www.shiksha.com/college-predictor