Hi I have gone through a Question in Ask Ubuntu main site where we have the answer as in comment format. If we can convert the comment as answer then we can close the similar Question like this and future Questions also.
Ask the commenter to post their comment as an answer, making sure to mention their name (like @Jai) so they get a notification.
Wait for some time so they can act on this. 24-48 hours should be long enough but it doesn't really matter if it's longer than that.
Post the answer as a community wiki answer, mentioning the person who posted it. Posting as a CW means you won't get any of the reputation from votes for the post. Using that feature here shows it was not your idea and that you have good manners.