Explain the following joke?\nKnock, knock! Who’s There?
Ash.
Ash who?
Bless you!
Explanation: Ash who? Sounds like “Achoo!” “Achoo” is how the sound of a sneeze is written in English in the United States. So when the asker asks “Ash who?” it sounds like Achoo! And if someone sneezes you say “Bless you!”