title: How to find out which radio button chosen by the user
body: <p>I have four radio buttons, the user must choose one of the four radio buttons.  </p>
  
  <p><img src="https://i.stack.imgur.com/aIWRy.jpg" alt=""></p>
  
  <p>The problem is each radio button has its own name differs from the other.</p>
  
  <p><strong>How to find out which radio button chosen by the user ?</strong></p>