This is one of those obnoxious questions like: If both your parents fell in the river and you could only save one, which one would you save?
One day in high school, I got tired of those stupid obnoxious questions, to I answered the teacher by saying, "I would walk away saving neither and thus relieving myself of the possible future guilt of not saving the other one." The teacher stopped asking questions like that any more.
That's a pretty twisted thing for a teacher to be asking. There would be inquiries, strikes, riots and media hysteria if that happened today.