If,'C % D' means 'C is the brother of D','C & D' means 'C is the mother of D','C × D' means 'C is the husband of D','C # D' means 'C is the sister of D','C D' means 'C is the son of D','C @ D' means 'C is the father of D',then how is P related to U in the following expression?P # Q % R & D T @ U

Let's decode the relations step-by-step:P # Q $\to$ P is the sister of Q (${\text{P}}^{(-)}-\text{Q}$)Q % R $\to$ Q is the brother of R (${\text{Q}}^{(+)}-\text{R}$)(So P, Q, R are all siblings)R & D $\to$ R is the mother of D (${\text{R}}^{(-)}\to \text{D}$)D $T$ \rightarrow$DisthesonofT.SinceRis{D}^{\prime }smother,Tmustbe{D}^{\prime }sfatherand{R}^{\prime }shusband($ \text{R}^{(-)} \Leftrightarrow \text{T}^{(+)}$)T@U$ \rightarrow$ T is the father of U. This means D and U are siblings (children of R and T).Now, let's analyze how P is related to U:U's mother is R.P is the sister of R.Therefore, P is U's mother's sister (maternal aunt).