title: jQuery selector for <select>'s <option> box
body: <p>Given the HTML below, I need a jQuery selector that selects the <code>&lt;option&gt;</code> with the <code>with-stamp</code> class.</p>
  
  <pre><code>&lt;select name="preset_select"&gt;
      &lt;option selected="selected" value="original"&gt;ORIGINAL&lt;/option&gt;
      &lt;option value="large"&gt;LARGE&lt;/option&gt;
      &lt;option class="with-stamp" value="medium"&gt;MEDIUM&lt;/option&gt;
  &lt;/select&gt;
  
  $("select[name=preset_select]").change(function() {
      // console.log( $(this).hasClass("with-stamp") ); // all false
      // console.log( $("select[name=preset_select] option").hasClass("with-stamp") ); // all true
  });
  </code></pre>