If x is the same color as Z, then it must be true that

Answer: 
W is a different color from any other country

Answer the questions on the basis of the information given below. A map representing countries R, S, W, X, Y and Z is to be drawn. Adjacent countries cannot be the same color on the map. The only countries adjacent to each other are as follows : * R, S, X and Y are each adjacent to W. * X is adjacent to Y. *R and S are each adjacent to Z.

If x is the same color as Z, then it must be true that