What is the method for admission in nlu after graduation which type of interence ???

Hey Ayush.

NLUs or National Law Universities are law colleges that provide five year integrated courses of Law

There are 2 types of Law courses in India- 3 year LLB course and 5 year integrated law course. 3 year law courses are for those who have completed their Undergraduation. So after completion of any 3 years of Undergraduate  course, you can do LLB which will be for 3 years. Hence It would take 6 years if you start with a separate UG degree. And in 5 year law course are for those who are seeking to puruse law after class 12th. It combines an Undergraduate degree with law, for example- BA LLb, BCOM LLb, BBA LLb etc. It takes 5 years after 12th class.

Admission in Nlus is through entrance called CLAT.

NLUs offer only 5 year law courses. Though you will be eligible to apply for NLUs even after graduation but it will lead to you wasting 2 years. You'll have to do a graduation degree again and it will take you 5 years to complete law where you can easily compelete it in 3 years. So after graduation 3 year LLB is more suitable.  Admission to various colleges is done through their own entrance exams or procedures. Here is a list of law entrances for 3 year LLB course -

DU LLB - Delhi University

MH CET- GLC mumbai, ILS Pune and other colleges in Maharashtra

SLAT- Symbiosis Law school

PU LLB- Panjab University, Chandigarh

LSAT- Jindal global Law school, IIT Kharagpur and other private law colleges

BHU LLB- Banaras Hindu University

BVP LLB- Bharatiya Vidyapeeth

TS LAWCET Etc

Best of luck!