hello Neha,

From many of the NIT's, here are some top who provides the best environment-

1- NIT, Trichy

2- NIT, Warangal

3- IIIT, Hyderabad

4- NIT, Calicut

5- IIIT, Allahabad

6- IIIT, Delhi

7- NIT, Rourkela

8- NIT, Allahabad

9- NIT, Surathkal

10- NIT, Surat

11- NIT, Nagpur

To get admission in these colleges your percentile should be around 98+, it will be more beneficial you score more than that to get CSE in top NIT's. Try to come under the rank of 20k.

Good luck!!