Hi Prasanna,
Administrator role is to provide user access to overall Adobe campaign instance, i.e all admin privilege.
If you want user to be able to see specific region recipients based on their location:
1) Create Location based Folders under Operators and assign operators to each folder.
2) Create Location Based folder and restrict it to those operators who belongs to operator<location> folder.
trying to do that with Admin right is not possible because that's the highest right assigned to an operator.