How to disable feedback review of particular post ?

You can disable the feedback review option from your particular post/page.

How to do:

• Access Posts/Pages
  Start by going to the Posts/Pages menu in WordPress. A new sub-menu will appear; click on All Posts or All Pages.
• View All Posts/Pages
  You’ll see a list of all your posts/pages displayed in a new window.
• Choose Post/Page
  Select the post/page for which you want to disable the feedback option and click on the Edit link for that post/page.
• Locate Feedback Settings
  On the right side of the edit page, scroll down to find the Was This Helpful section/Meta Box.
• Disable Reviews

  Check the box labeled Disable Reviews and then click on the Update/Publish button for the post/page to save the changes.