Given,
P is the wife of R, so P is female and R is male.
T is the brother of R, so T is R's male sibling.
Q is the daughter of T, so Q is T's female child.
Q is the wife of S and S is the father of U; therefore Q is the mother of U.
Since T is R's brother and Q is T's daughter, Q is the niece of R.
Because P is R's wife, P is also the aunt of Q.
As Q is the mother of U, P is the aunt of the mother of U.
Therefore, P is related to the mother of U as Aunt.
Hence, option(D) is correct.


























