Hello Anjali,
There is no any particular books or syllabus so it is advisable to revise what you have studied in your class 12th and apart from that you can go for sample and previous year papers as it will help you to know the difficulty level along with the paper pattern as well.
You can download the sample papers with the given below link.
http://bhuonline.in/old-qus-paper-entr.html
You can check the Exam Pattern & topics covered in the exam for the particular programme with the given below link.
https://university.careers360.com/articles/bhu-uet-exam-pattern
Good Luck!
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