What is one example of situational irony in the cask of amontillado?

Another example of situational irony is in the premise under which Fortunato goes into the catacombs to begin with. He believes Montresor is doing him a favor, but in fact, ironically, Montresor means to do him harm. Dramatic irony occurs when the audience knows something a character or characters doesn't know.

Explanation:

i think the literacy device is "it's frozen head"

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