Delhi University (DU)

There is a centralised on DU portal for general and reserved category students. There is 5% reservation of seats for candidates under ECA/ Sports quota in DU colleges.
At the time of online registration, you need to upload the certificate as an evidence of participation in a particular ECA activity. It may also be noted that the certificate should not be more than three years old.

You are eligible to seek admission in B.Sc (Hons) in Delhi University affiliated colleges. You may refer to the following link for details of last year's cut-off in DU:
http://www.du.ac.in/index.php?page=cut-off-2016
This will help you to evaluate your chances and deciding in which college you must apply for admission.

Yes, Bharatiya Vidyapeeth University, is one of the good institutions for management courses, without hesitation you can apply and join the same course.

Yes, you will definitely get admission as you belong to the OBC category.

Yes, in all likelihood, B.Com is headed towards an entrance exam.
The modalities are still being worked out as how it is going to be conducted and what will be the syllabus of the entrance.