Who's your teacher? I probably know him - lol. From a teacher's perspective, I think it is unfair as well. One question should not drop your marks like that. Maybe speak to your classmates and see how they feel. Maybe several of you can approach the teacher and ask him/her to reconsider and explain how one question wrong drops your mark by 4% is unfair. You seem a like s good sudents who works hard and care about his marks. Good luck.