If Xis the brother of Y and P, Z is the mother of Y and Q is the father of X, which one of the following statement is not definitely true ?
X(m), Y and P are siblings.
Z is their mother and Q is father, => Z is wife of Q.
Hence, second and fourth are definitely true. First can be true if Y is a male.
But third option can never be true, since X is brother of P.
=> Ans - (C)
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