Read the following information carefully and then answer the questions given below:
P # Q means P is the father of Q
P + Q means P is the mother of Q
P - Q means P is the brother of Q
P * Q means P is the sister of Q
From the given relation, we can understand that A is the mother of B, who is the father of C, who is the brother of D.
This makes A the grandmother of D.
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