With the score you're mentioning you'll get a rank somewhere between 4100-4900. If you fall in OBC category and even if you have the state domicile Bihar, chances are bleak that you'll CNLU Patna. But you have some chances of getting into NLUs like Guwahati, Trichy, Nagpur, Shimla and Jabalpur. 

Apart from that you can try out for some colleges under IPU like 

• Ideal Institute of Management and Technology 
• JIMS Engineering Management Technical campus, school of Law 
• Fairfield Institute of Management and Technology 

And you can check out the colleges you can get with your rank using the following link 

https://law.careers360.com/clat-college-predictor

For any further queries feel free to ask. Good luck.