Hii

You can get a book for the entrance exam.

A book by Arihant publications is there for the same get it and start practicing Questions and topics from it. It is a very good book and you can get through and BBA/bcom exam by solving it with proper concentration and seriousness. After you are done with that book. Don't forget to do previous year papers of the same . I am providing a link where you can find the previous year papers. http://bhuonline.in/old-qus-paper-entr.html 

Thanks

Hope it helps !!!