title: How to use ng-class in select with ng-options
body: <p>I have an array of Person objects</p>
  
  <pre><code>var persons = [
  {Name:'John',Eligible:true},
  {Name:'Mark',Eligible:true},
  {Name:'Sam',Eligible:false},
  {Name:'Edward',Eligible:false},
  {Name:'Michael',Eligible:true}
  ];
  </code></pre>
  
  <p>and i am using select with ng-options like this:</p>
  
  <pre><code>&lt;select ng-model="Blah" ng-options="person.Name for person in persons"&gt;&lt;/select&gt;
  </code></pre>
  
  <p>I want to show the record with <strong>Eligible:false</strong> in <strong>red</strong> color.
  So the problem is how do i use the <code>ng-class</code> in <code>select</code> inorder to achieve this? Since we are not using any <code>option</code> tag it wont work if i simply add <code>ng-class</code> in the <code>select</code> element itself.</p>