$C_2H_6(g)+nO_2 \to CO_2(g)+H_2O(l)$ In this equation, the ratio of the coefficients of $CO_2$ and $H_2O$ is

Question

$\begin{array}{1 1} (a)\;1:1 \\ (b)\;2:3 \\ (c)\;3:2 \\ (d)\;1:3 \end{array}$