Introducing a boy, a girl says, "He is the son of my mother's only son." Who is the boy to the girl?ABrotherBSonCNephewDCousinAnswer: C. Nephew Read Explanation: “My mother’s only son” = the girl’s brother (or the girl herself if no brother, but “son” indicates male).The boy is the son of that person.So, the boy is the girl’s nephew. Read more in App