Hi
Can I make a point too, which you are probably already aware of. However, the fact that the question you asked only had 3 possible answers, leads me to think you are studying the older (black) confuser. Not that this really matters, but the new confuser is green, and every question has 4 possible answers.
Am just saying this because if this is your first PPL ground exam, you may be shocked when you see 4 possible answers and not 3 on the exam paper.
Good luck
V