If X @ Y means X is the father of Y; X * Y means X is the mother of Y; X / Y means X is the brother of Y; and X # Y means X is the sister of Y, then which of the following shows that P is the maternal uncle of Q?
P / M * N # Q
P / M → P is the brother of M
M * N → M is the mother of N
N # Q → N is the sister of Q
Therefore, P is the maternal uncle of Q.