The correct response is:
Dramatic irony is when the audience knows something that contrasts with a character's expectations, while verbal irony is when someone says something that is the opposite of what they mean.
This definition succinctly captures the essence of both types of irony. Dramatic irony involves a discrepancy between what the audience understands and what a character believes or expects, while verbal irony involves a contrast between what is said and what is actually meant.