With the rank you're mentioning you can have very little chances of getting into RMLNLU Lucknow given that you have the defense quota and you fall in OBC category. But you can surely look out for other good colleges as you have a pretty decent rank. 

Check out for these colleges 

• KIIT Bhubaneswar 
• UPES Dehradun 
• Ideal Institute of Management and Technology 
• Fairfield Institute of Management and Technology 
• JIMS Engineering Management Technical campus, school of Law 
• ICFAI Dehradun 

Apart from that you can check out the colleges you can get with your rank using the following link 

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

Good luck