In a family, there are three sons: X, Y, and Z. X is the eldest son and Y is the youngest. Z is the only son who is married. If Z has two daughters, what is the relationship of Y to Z's daughters?
A team of four members is to be formed from the following candidates: P, Q, R, S, and T. The selection criteria are: 1) P and Q cannot be selected together. 2) R must be included if S is included. 3) T can be included only if P is not included. Which of the following combinations meets the selection criteria?