suggest some top universities in india and abroad for nuclear physics
Hello modest one,
So you dropped particle physics ? It's fine, of course, but it gives a somewhat lighthearted impression. And nuclear physics in itself is a broad field as well ! How well do you know it ?
Your question is way too unfocused. You could read up on the subject and see where most of the current activity comes from. But you shouldn't think that the currently best university in general is also the best for you in your future.
Separate names with a comma.