A Dilemma.

I'll be spending the rest of the day cramming for a test in my lousy night class taught by the teacher who refuses to actually learn the material he's supposed to be teaching.

A question: If you're faced with a question on a test that deals with material the teacher taught wrong in class, do you answer the question with the correct answer and risk having it marked wrong, or do you answer it with the wrong answer the teacher taught in class?