Which scenario would show an example of situational irony?

Portia does not believe that Brutus is telling the truth when he tells her he is simply ill.

Brutus lies to Portia about his health, knowing that he is fine.

Portia says that Brutus is wise, because if he were not in health, he would try to get well.

Brutus says that he is about to do something that will make him well, but ends up killing himself.