AngularJS 1.2.x

var app = angular.module('plunker', []);

app.controller('MainCtrl', function($scope) {
  $scope.form = {
    selectedStage: null,
    stage: [{
      optional: 1,
      id: 23,
      description: 'UD Visual Inspection - optional'
    }, {
      optional: 0,
      id: 12,
      description: 'Flash'
    }]
  }
});

<!DOCTYPE html>
<html ng-app="plunker">

<head>
  <meta charset="utf-8" />
  <title>AngularJS Plunker</title>
  <script>
    document.write('<base href="' + document.location + '" />');
  </script>
  <link rel="stylesheet" href="style.css" />
  <script data-require="angular.js@1.2.x" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.min.js" data-semver="1.2.19"></script>
  <script src="app.js"></script>
</head>

<body ng-controller="MainCtrl">
  <select name='test_stage' 
    ng-model='form.selectedStage' 
    ng-change='abc(form)' 
    ng-options='item as item.description for item in form.stage'>
    
  </select>
  
  <div>{{form.selectedStage}}</div>
</body>

</html>

/* Put your css in here */