The mass ratio of steam and hydrogen is found to be $$1 \colon 1.5$$ at equilibrium in the reaction $$3\text{Fe}(s) + 4\text{H}_2\text{O}(g) \rightleftharpoons \text{Fe}_3\text{O}_4(s) + 4\text{H}_2(g)$$. The value of the equilibrium constant $$K_c$$ of the above reaction is

A

$$3.0 \times 10^{-5}$$

B

$$3.3 \times 10^4$$

C

$$3.3 \times 10^6$$

D

$$1.3 \times 10^3$$