BBA Entrance Exam

The main topics that you need to focus on are verbal, quant, logical and general knowledge.
Quant also includes DI.
There's a book by Arihant but it's best if you get material from somewhere.
Ideally, you should join Pratham as it's the best institute when it comes to entrance preparation. (Bias towards Pratham as I was a a student there).
Make sure that you are up to date with class 12th maths as that's likely to be asked and it's a section of which most students are scared.
Gk is pretty basic but log on to clatgyaan and check out their yearly compendium.
Verbal is simple, logical reasoning needs a little practice though.
Finally, check out last year's papers on the website to get a fair idea of what your weak areas are and work on them.