Components X and Y are mixed together and allowed to reach equilibrium. The concentrations of X, Y, W and Z in the equilibrium mixture are 4, 1, 4 and \({\text{2 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) respectively.

X + 2Y \( \rightleftharpoons \) 2W + Z

What is the value of the equilibrium constant, K_c?

A.     \(\frac{1}{8}\)

B.     \(\frac{1}{2}\)

C.     2

D.     8

D