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Pointing to a picture, a girl says, 'He is my father's only son.' How is the person in the picture related to the girl?
Father
Brother
Uncle
Husband
Brother
Whenever the phrase 'my father's only son' appears, it directly identifies a male sibling; for a girl, the only son of her father is her own brother.
Whenever the phrase 'my father's only son' appears, it directly identifies a male sibling; for a girl, the only son of her father is her own brother.
Analyze the statement
The speaker is a girl. She refers to a person in a picture as 'my father's only son'.
Deconstruct the relationship
If the girl has a father, and that father has only one son, that son must be the brother of the girl herself.
A: He is the girl's sibling, not the parent. C: An uncle is the father's brother, whereas this person is the direct descendant of the father. D: The girl is the sister of the person in the picture, not the spouse.
B is correct because the phrase 'my father's only son' refers to the unique male child of the girl's father, which by definition is the girl's brother.
Watch for 'only son' vs 'only child'. If it said 'only child', the speaker would be referring to themselves, but 'only son' specifically confirms a male sibling.