Hey Karuna!

Hope you are doing well.

About your query, if you wanna do your best in the entrance test the solve all the past year question papers of BHU of the course you wanna give entrance for.

That will be more than enough for your preparation. I am attaching the official website's link, you can view the question papers there:

http://bhuonline.in/old-qus-paper-entr.html

Hope this helps. All the best!