Hi there,

You have not mentioned the university in which you are interested for applying for BA.LLB or BBA. LLB, but it has  been a trend that most universities conduct only one entrance test for both its BA.LLB and BBA.LLB courses, and then they release different cutoff lists for the two courses, so to answer your question, you will not have to sit for two different exams and you can apply for both by giving a single entrance test.