Dear Prateek,

According to you,  you are belonging to the SC category. So, you have an SC category quota. And also your AIR 12039 and SC rank 349 AIR. There is a chance to get admission to NLUs. According to the previous years, the closing rank for the SC category are given below:-

NLSIU Bangalore 2018,

NLIU Bhopal 4940,

WBNUJS Kolkata 4891 ,

MNLU Mumbai 18833,

CNLU Patna  18898, etc.

To more information about CLAT 2021 and CLAT Marks vs rank :-

CLAT Exam 2021: Results OUT, Final Answer Key, Cut off Marks, Counselling (careers360.com)

CLAT Marks vs Rank - Merit List analysis, College Predictor, Institute and category wise (careers360.com)

Hope this information helps you...

Best of luck :)