Sir, is it possible to add more choices after each round of counseling? If yes then how?

When counselling rounds take place , a candidate is allotted a seat in a particular institution with a specific branch as per the deservance according to rank, and once allotted or to be clear once the branch freezed, it can not be changed at any cost,........so eother you better make up your mind for whatever has been allotted to you or go for another option that is to apply at some other leading institutions,.......you may gather information from the official websites of these institutions – Guru Jambeshwar Uni of Sci and Tech, Hisar,...................Lovely Professional Uni, Phagwara,................BITS Pilani,.................DIT uni, Dehradun