Hi there

You can get previous year question papers of BHU for class 11 entrance examination for science stream , bio group by going through its official website,the link for the same is provided below

http://bhuonline.in/old-qus-paper-set17.html

These past year papers will help you to understand the types of questions which are asked in exam, you will understand the important topics which are covered in the exam by practising them, you will also get to know your preparation level .Best of luck for your examination.

Thankyou