If \(A\) is brother of \(B, C\) is brother of \(B\), and \(A\) is brother of \(D\), then which of the following must be true?
We can say \(A\) and \(C\) are male but we can not say anything about \(B\) and \(D\) so only choice (A) is definitely true.\[\]Choice (A)
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