Banaras Hindu University

Yes, you can apply for B.Sc Maths. Forms will be out in May.

No, there is no limit, but you should get a decent score.

Any CLAT comprehensive book will do.

You will find a mixed crowd at Punjab University, but mostly middle and higher class student are seen. If you have to make a comparison between the both, I would suggest Punjab University is much better.

Dear Diwan,
Not at all. Since you are a student of PCM, I believe that you are very good at Maths and logical reasoning which is the core of entrance. But Diwan, I would like to suggest you to have a good grasp on some business & economic knowledge. Hope this helps. Upvote the answer if you feel satisfied. Good Luck.