title: Drupal 8: Unwanted N/A option showing in radio button
body: <p>I'm using Drupal 8. How to remove N/A option in radio button?</p>
  
  <p><a href="https://i.stack.imgur.com/jrDSl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jrDSl.png" alt="image1"></a></p>
  
  <p><a href="https://i.stack.imgur.com/o8ZAF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/o8ZAF.png" alt="image2"></a></p>