title: How to iterate without duplication in php
body: <p>I want to print custom_question without duplication and it custom_question_answer using loop in php 
  link of the db is as given below</p>
  
  <p><a href="https://i.stack.imgur.com/8TvfE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8TvfE.png" alt="enter image description here"></a></p>