A team of four members: X, Y, Z, and W must be selected based on the following criteria: 1) X cannot be selected if Y is selected. 2) Z must be selected if W is not selected. Which of the following selections is valid?
In a circular seating arrangement, A is sitting to the immediate left of B, and C is sitting to the immediate right of A. If D is sitting directly opposite to B, who is sitting to the immediate left of C?