Read the information carefully and answer the following question: 'A + B' means A is the brother of B 'A - B' means A is the sister of B 'A * B' means A is the mother of B 'A / B' means A is the father of B In the given expression Q * P + R + S, how is P related to S?

Pankaj (Male) pointed to a girl and said, 'Her paternal grandfather's only son's wife is my mother.' What is Pankaj's relation to that girl?

A + B means 'A is the wife of B'; A - B means 'B is the daughter of A'; A × B means 'B is the brother of A'; A ÷ B means 'A is the father of B'. If P + R × T - Q + S ÷ U, then how is P related to the mother of U?