If X - Y means X is the sister of Y, X + Y means X is the brother of Y, and X × Y means X is the daughter of Y, what is the relationship of Z if X - Z + Y means X is the sister of Z and Z is the brother of Y?
Answer: A. Z is X's brother
According to the codes, if X is the sister of Z and Z is the brother of Y, then Z must be X's brother.