Hi Riya,
FOR BLAT: Arihant Experts, Gaurav mehta are the authors you can check the books,
FOR SET: EBC WEBSTORE has a set of books which you can use if you are giving multiple exams.
Also you can use online free PDFs which are available for the exams you wish to give.
You can use the two links which are provided below to download the previous year question papers for BHU LLB entrance exams as well as a few sample papers.
I hope my answer would have enlightened you on your question.
If you like this answer please do upvote and share this answer.
All the best.
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