title: How to set drop box values to unique when retrieving from db in laravel 5?
body: <p>There are some duplicate rows in db table. When retrieving  from db and setting for the drop box, it should display values uniquely. How should I perform that?</p>
  
  <p><a href="https://i.stack.imgur.com/rFyT4.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rFyT4.jpg" alt="enter image description here"></a></p>
  
  <p>There I want to avoid duplicating 2 in the drop box</p>