BHU BA LLB is devided into the sections like General Knowledge and Current Affairs, Legal Aptitude, Mental Ability, English Comprehension. If you are preparing  for CLAT or any other 5 years programme then it would be helpful for you.

You just have to follow the current affairs for last 6 months before the BLAT. You should read static Gk in English your main focus should be on vocabulary and Grammar portion ,in maths you need to prepare maths of up to 10th standard, in legal you have to be prepared for legal reasoning as well as legal knowledge.