AngularJS select creates option with value “? object:null ?” and doesn't use empty default option when bound to null

Answer 1

Below solution solved the problem for me.

The problem here is when ng-model is used, it adds a default option with value "?" and without using ng-model, one can not use ng-change to get the current selection. I have actually created an onChangeSelection() within which we can set the defaultSelected property of the like below

$scope.onChangeSelection = function(id) {

    document.getElementById(id)[0].defaultSelected = true;
    $scope.selected = $('#'+id).val();
}