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X is the sister of Y. Z is the wife of Y. W is the father of Z. How is W related to Y?
Father
Father-in-law
Brother-in-law
Uncle
Father-in-law
Visualize the relationships: Z is the wife of Y, so Y is the husband. Since W is the father of Z (wife), W must be the father-in-law of Y.
Visualize the relationships: Z is the wife of Y, so Y is the husband. Since W is the father of Z (wife), W must be the father-in-law of Y.
Establish the relationship between Y and Z
The problem states Z is the wife of Y. This implies Y is the husband of Z.
Establish the relationship between W and Z
The problem states W is the father of Z. Since W is the parent of Y's spouse (Z), W holds the relationship of father-in-law to Y.
A: Father is incorrect because W is the father of the wife, not Y; C: Brother-in-law is incorrect as the generation gap clearly defines a parental relationship; D: Uncle is incorrect because W is the direct parent of the spouse, not the parent of a sibling.
B is correct because W is the father of Y's wife (Z), which by definition makes W the father-in-law of Y.
In blood relation questions, always identify the link between the spouse's parents and the subject to distinguish between father-in-law and other patriarchal relations.