Question

If P @ Q means P is the father of Q, P * Q means P is the brother of Q, P % Q means P is the mother of Q, P $ Q means P is the daughter of Q, then in N % R $ P @ O * Z which of the following statements is definitely true ?

A Z is the brother of R
B O is the grandson of N
C Z is the child of N
D O is the only son of P
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