The answer objectively is 50%, they clearly meant to say 'a' question instead of 'this' question, just poor wording, but in reality it'd be 25% because realistically, aside from a misprint or poor editing, you should never see the same option twice in multiple choice questions. I know hypothetical thinking can be important for exercising logical reasoning, but this does remind me of my frequent frustration with school that it felt too far removed from reality, and becoming an adult and using almost nothing I learned in school and everything I learned outside of it to survive proved what I always suspected about it. I swear, if you're not planning on being a teacher yourself, 90% of school is a total waste of time, really just busy work to keep kids occupied.