Hey Priyanshu.

AILET is a national level entrance exam for admission to only one college which is National Law University, Delhi or NLU Delhi. There are various NLUs in India, these provide the 5 year integrated course of Law. Admission to all NLUs expect NLU Delhi is done through CLAT exam. Admission to NLU Delhi is done through AILET. There are no other colleges that offer admission through AILET. These are 5 year courses of Law that combine an Undergraduate degree like BA, BCOM, BBA etc with Law. As you're in 2nd year BBA you are though eligible for these 5 year courses but if you wish you pursue law you should go for 3 year courses. In order to avoid repeating an Undergraduate degree again. You can appear for 3 year law entrance in final year of your BBA degree ie 8th sem. There are various colleges that provide  3 year law course like DU LLB, BHU LLB, PU LLB, MHCET, LSAT etc. NLua don't provide any 3 year law course.

Best of luck