Hyy manav, 

You have a very outside chance of getting lower NLUs at your rank of 1641

Considering your rank you don't seem to have a possibility to get an NLU as the cut offs in previous years were very high.

1. National Law School of India University- 59

2. National Academy of Legal Studies and Research- 130

3. National Law Institute University- 351

4. West Bengal National University of Judicial Sciences- 213

5. National Law University Jodhpur- 343 6. Hidayatullah National Law University- 574

7. Gujarat National Law University- 453

8. Ram Manohar Lohiya National Law University- 627

9. Rajiv Gandhi National University of Law- 801

10. Chanakya National Law University- 909

11. National University of Advanced Legal Studies- 826

12. National Law University Odisha- 1023

13. National University of Study and Research in Law- 1051

14. National Law University and Judicial Academy- 1124

15. Tamil Nadu National Law School- 1151

16. Damodaram Sanjivayya National Law University- 1180

17. Maharashtra National Law University, Mumbai- 478

18. Maharashtra National Law University, Nagpur- 1126

This was last year cutoff for you to analyze it

I hope this helps