2.
Which of the following contains a pun?
To the guy who invented zero, thanks for nothing.
I blinked at the bright light outside.
But that shirt is missing sleeves!
The cold air hit me like a ton of bricks.
The correct answer is: To the guy who invented zero, thanks for nothing.
This is a pun because it uses the double meaning of "nothing". "Thanks for nothing" means "thanks for doing nothing" and also means "thanks for inventing the concept/number of zero".