title: Angular 2 - dynamic "for" attribute in ngFor
body: <p>When i write dynamic "for" attribute in label, i get error.</p>
  
  <p>example:</p>
  
  <pre><code>&lt;div *ngFor="let question of questions; let i = index;"&gt;
          &lt;input id="ques-{{i}}" type="radio" name="selected" [value]="question"&gt;
          &lt;label for="ques-{{i}}"&gt;{{question.data}}&lt;/label&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>the error :</p>
  
  <blockquote>
    <p>Unhandled Promise rejection: Template parse errors: Can't bind to
    'for' since it isn't a known property of 'label'.</p>
  </blockquote>
  
  <p>the dynamic "id" attribute working fine, please help me to find a solution</p>