during seat allotmnt in aieee, will i be offerd particular institute with branch or i ll be given 2-3 choices of dffrnt collgs on rank basis

i have a confusion..wheter on the basis of my rank will i be given 2-3 chocies of different colleges or directly a particular institution with particular branch.....by the way i have air 28504 ,will i get mechanical branch in it ggu bilaspur in second round couselling