Want to add none as value in select multiple : <p>I am using chosen.jquery.js for select field</p>

<pre><code>&lt;select chosen multiple data-placeholder="Select Body Part(s)"  
ng-options="option.Name as option.Name for option in BodyPartList" ng-model="Body_Part"&gt;
      &lt;option value="" disabled&gt;Select Body Part(s)&lt;/option&gt; 
&lt;/select&gt;
</code></pre>

<p>But It shows only data-placeholder value in case of no data in model.
I want to show "Select Body Part(s)" as a option in list.
And user must not select this. Reason is that, I want to add dynamic "Unknown" value in list of Body_Parts. But it not reflect in list.</p>

<p>Same work for select having single selection.</p>
