AILET is the entrance exam to get admission in Undergraduate ( 5 years Integrated programme) & Postgraduate ( LLM programme) in NLU Delhi. You can check the further information with the given below link.

https://law.careers360.com/articles/ailet

In case you have any other query then let me know.

Good Luck!

Hey Soniya 

Yes you can apply for LLM course in NLU Delhi if you have completed the course of BBA LLb. You would require a minimum aggregate of 50% to be eligible for admission here. Admission will be based in your score in their self conducted admission test- AILET.

You can use the link below for registration 

http://nludelhi.ac.in/adm-llm-adp.aspx

Best of luck!