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D is the father of E. B is the son of F. D is married to F. K is the son of R, and R is the father of F. How is R related to D?
Brother
Wife's father
Father
Wife's brother
Wife's father
Identify the chain: D=F (Married) → R is F's father. Therefore, R is the father of D's wife (F), making him the father-in-law (Wife's father).
Identify the chain: D=F (Married) → R is F's father. Therefore, R is the father of D's wife (F), making him the father-in-law (Wife's father).
Mapping the relationships
D is the father of E, and D is married to F. This makes F the mother of E. B is the son of F (and thus son of D).
Connecting the parent generation
R is the father of F. Since D is married to F, R is the father of D's wife (F).
Determining the relation
A person who is the father of one's spouse is known as the father-in-law, which matches the option Wife's father.
A: Brother is incorrect as R is from the generation above D. C: Father is incorrect because R is the father of F, not D. D: Wife's brother is incorrect because R is explicitly stated as the father of F.
B is correct because R is the father of F, and since F is D's wife, R is the father-in-law of D, denoted as Wife's father.
In blood relations, always draw the gender (Square for Male, Circle for Female) and marriage (=) to avoid confusion during complex multi-generational problems.