‘A # B’ means ‘A is the brother of B’‘A @ B’ means ‘A is the father of B’‘A & B’ means ‘A is the mother of B’‘A % B’ means ‘A is the wife of B’If ‘P & Q # R % S @ T # U’, then how is P related to U?

Let's decode the given expression ‘P & Q # R % S @ T # U’ step-by-step:T # U $\to$ T is the brother of U.S @ T $\to$ S is the father of T (so S is the father of both T and U).R % S $\to$ R is the wife of S (so R is the mother of both T and U).Q # R $\to$ Q is the brother of R.P & Q $\to$ P is the mother of Q (so P is also the mother of R, as Q and R are siblings).Since R is the mother of U, and P is the mother of R, P is the mother's mother (maternal grandmother) of U.