A map representing countries R, S, W, X, Y and Z is to be drawn. Adjacent countries cannot be of the same color on the map. The 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, which one must be true?

A. R is the same color as Y

B. S is the same color as X

C. X is the same color as Y

D. S is a different color from any other country

E. None of these

Explanation: প্রদত্ত শর্ত থেকে কোনটিকেই সন্দেহাতীতভাবে সত্যি প্রমান করা যায় না।