z(mother)
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Y(g)----Q(g)----p(s)
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A(s)

P is maternal uncle of A

@skb

"Given: If A is the son of Q, Q and Y are sisters, Z is the mother of Y, and P is the son of Z.

To find: Relation between P and A

It is the question of blood relation from subject of logical reasoning.

Here is the answer: P is the maternal uncle of A.

"