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A is B's father. C is A's son. D is B's only sister. How is C related to D?

ACousin
BBrother
CNephew
DUncle
Answer & Solution
Correct answer: B. Brother
A is B's father. C is A's son → C and B are siblings. D is B's only sister → D is also A's daughter (i.e., another sibling of B and C). **Therefore C is brother to D.**
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