Hi,
Following are the best three NIT colleges:
National Institute of Technology, Tiruchirappalli
National Institute of Technology, Warangal
National Institute of Technology Calicut

Here is a link that will help you with the information you need

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/nits-cutoff-for-b-tech-computer-science-and-engineering/amp&ved=2ahUKEwjssfakl4TqAhXSXSsKHRxGBF4QFjABegQICxAJ&usg=AOvVaw1PhmrOfcUHEdaiONepruMs&ampcf=1