We can use ng-selected to bind the presence or not of the selected attribute to the option tag.
The following code shows how to ng-selected.
<!-- w w w.jav a 2 s .co m-->
<!doctype html>
<html ng-app="myApp">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0-rc.3/angular.js"></script>
</head>
<body>
<input type="checkbox" ng-model="isB" >check me to select B</input><br/>
<select>
<option ng-selected="!isB">A</option>
<option ng-selected="isB">B</option>
</select>
<script>
angular.module('myApp', [])
</script>
</body>
</html>
The code above is rendered as follows: