If X is the same color as Z, then it must be true that
A
R is the same color as Y
B
W is a different color from any other country
C
X is the same color as Y
D
S is the same color as X
Correct Answer: W is a different color from any other country
R,S, X and Y each are adjacent to W, so W can not be the same color as X, as x is the same color as Z, So W can not be the same color as Z too. So W is different from any other country.