Hey Abhishek.

These are the NLU preferences one should normally fill-

NLSIU ,Bangalore

NALSAR, Hyderabad

WBNUJS, Kolkata

NLUJ, Jodhpur

NLIU, Bhopal

GNLU, Gandhinagar

MNLU, Mumbai

RMLNLU, Lucknow

HNLU, Raipur

RGNUL, Patiyala

NLUO, Cuttack

CNLU, Patna

NUALS, Kochi

NUSRL, Ranchi

NLUJJA, Assam

TNNLS, Trichy

DSNLU, Visakhapatnam

MNLU, Nagpur

HPNLU, Shimla

Here I would like to mention that most of the people prefer NLIU over NLUJ but that would be a huge mistake.

And also CNLU and NLUO may be filled interchangeably as it makes no difference.

Hope this serves your query. Please feel free to respond and ask further questions. 

All the best.