hi,

in entrance test of bhu for b.sc in agriculture studies questions will come on mental ability-25 question, chemistry-25 question , physics and mathematics-50 questions, botany and zoology -50 questions. agriculture -50 questions, so there is no option for skip any part. however if you dont know any answer correctly than it better to skill as there is negative marking scheme for each wrong attempt.

you may follow the below link to know about previous years question:

http://bhuonline.in/pdfs/UET_2017/B.Sc%20Ag.pdf