Abhishek, in 2019 under State Quota, an All India Rank of 4531 secured a seat in CSE under OBC Category. Now this is 2019 data and cut offs change every year. For a seat in NIT Patna under OBC Category, you will need atleast 240 and above. Now this is based on previous years data. But 240 and above will put you in a decent place. For assistance in JEE Preparation, we have JEE Knockout: https://learn.careers360.com/knockout-jee-main-april/