B.Com

In my opinion B.Com+MBA will be the best option for anyone because MBA provides courses which include core curriculum of subjects such as accounting, economics, marketing and operations.
Some schools require MBA candidates who have completed their internship from a company or an organization which can lead to concrete job opportunities after the programme. Follow your own path and you have also done B.Com so you already have some knowledge of taxation and economics. In my point of view, you should do MBA along with an internship.

The exam is AUCET. For details of syllabus, pattern etc. Check:
https://www.shiksha.com/university/Andhra-university-Visakhapatnam/exams/aucet/syllabus?q=AUCET&rf=searchwidget&landing=ep.

You may go for the following colleges:
SRCC, Delhi University
DCAC, Delhi University
Maharaja Surajmal Institute, Indraprastha University
Amity University
Sharda University
Galgotia University.

Class 10th or Class 12th marks don't matter for applying CAT or MAT. All you are required to have at least 50% in graduation, and if you are in final year, then you must have maintained at least 50% marks in the last 2 year's exam.

I am not really sure, if they will grant you admission based on you B.Com. As the eligibility is you need to have passed 10+2 from a recognized university.
To know on what basis you will be granted admission please contact the college authorities on the numbers provided in the link: http://mu.ac.in/portal/contact-us/

Hi Bindu,
You can always google the previous year cutoffs, so that you can get a clear picture of the ranks for particular colleges. All the best.

The admission of B.Com for any other course 2nd year will depend on the score that get in 1st year. So, please share the same for details.

Hi Manav,
Yes, the admission is done through counselling based on marks obtained in 10+2.

According to me, rather than doing M.Com, MBA is a good choice. It not only provide you skills, and they will give an excellent career growth, and it will help you to provide good job opportunities in today competition. All the best.

Yes, you can take admission for B.Com in IGNOU, as they announce dates twice in a year you need check it online on the official website of IGNOU.
Good luck.