Oedipus suggests he will cast out the one who has brought this suffering on his city a clear tension is created between what knows and audience What literary device present?

The correct answer is dramatic irony.

Dramatic irony is a literary device that creates a tension between what the characters know and what the audience knows. In this case, Oedipus suggests that he will cast out the one who has brought this suffering on his city, but the audience knows that he is the one who has caused the suffering. This creates a sense of suspense and anticipation, as the audience waits to see what will happen when Oedipus discovers the truth.