(B) R, T, Z S, V, Y W, X
(C) R, W, X V, Y, X S, T
(D) R, X, Z T, V, Y S, W
(E) R, X, Z V, W, Y S, T
2.Which one of the following is a complete and accurate list of classes any one of which could be the class to which V is added?
(A) class 1
(B) class 3
(C) class 1, class 3
(D) class 2, class 3
(E) class 1, class 2, class 3.
3.If X is added to class 1, which one of the following is a student who must be added to class 2?
(A) T
(B) V
(C) W
(D) Y
(E) Z
4.If X is added to class 3, each of the following is a pair of students who can be added to class 1 EXCEPT
(A) Y and Z
(B) W and Z
(C) V and Y
(D) V and W
(E) T and z
5.If T is added to class 3, which one of the following is a student who must be added to class 2?
(A) V
(B) W
(C) X