Colleges in USA

It depends on the branch you want to join. For branches like CSE, mechanical, ECE, and civil, you need to get at least 1000 to 1500 rank if you are from the open category. There are other small branches like metallurgy, marine, civil and environmental. To get a seat in these small branches, you need not have a good rank like 1000 to 1500. Ranks from 4000 to 5000 (open category) are enough. I am also studying in AU first year, my rank was 5461 (open category) and I got the civil environmental branch in my 2nd round counselling. Civil and civil environmental don't have much difference. The difference is in 4th year, your subjects will differ from civil subjects.