which is better? IMT nagpur or IMT hyderabad?

They're equally good. IMT Nagpur is slightly older than Hyderabad and has a better campus. Placements are comparable, with Nagpur's average be slightly high. Hyderabad as a location is better being one of the IT hubs in the country and if your profile matches it a bit and want a career in IT, Hyderabad is a great place to be.

why not imt ghaziabad

@saurabh where do you currently stay?