I don't like hearing about all the boneheaded test questions that get brought up on this forum.
If I were taking a test today and had to answer a question that had no correct answer as one of the choices or had a situation that was impossible to be correct because of other conditions outside of the scope of the intent of the question I would write my own answer explaining the situation.
If they want to count it wrong there had better be a way to contest the question, If not, at least I got them to think about what they did wrong with the wording of the question.
All that said it is not fair to the people taking these tests. I can say what I said before because of my experience, but back when I took my tests I probably would have had a different opinion and may not have even caught the mistake in the question.
People writing the questions need to have enough experience to not make them kind of mistakes very easily. Test questions do not need to be hard, all the test is about is to see if the applicant is competent enough to everyday things, knows how to find things in the code book, knows how to use certain parts of the code for common calculations, knows basic electricity concepts, and knows about the laws in the jursidiction where taking the test.