The topics of BHU LLB syllabus are General Awareness & Current Affairs, Common Legal Knowledge, Aptitude and Mental Ability. In detail about the topic you can check below.

General Awareness & Current Affairs
Events that were popular
Economics
History
Geography
General Science
Politics Developments in the areas of Economics, Science, Sports, Places, Persons, etc

Common Legal Knowledge

Indian Constitution
Indian Penal Code
Intellectual Property Rights
Family Law
Indian Contract Act
Labour Laws, etc.
Aptitude & Mental Ability Modern Mathematics
Arithmetic
Mensuration
Commercial Maths

Good Luck!