Which of the following accurately explains the use of irony in this passage?

Joseph uses verbal irony when he explains Pharaoh’s dreams to him.

The fact that a slave becomes second in power in Egypt is an example of dramatic irony.

The fact that the weaker cows are eaten by the larger cows is an example of situational irony.

The fact that the leader of Egypt needs the help of an imprisoned slave is an example of situational irony