Surface Chemistry

\(\text { Match the following }\)

$$ \begin{array}{llll} \hline & \begin{array}{l} \text { List-I } \\ \text { (Sol) } \end{array} & & \begin{array}{c} \text { List-II } \\ \text { (Method of preparation) } \end{array} \\ \hline \text { (A) } & \mathrm{As}_2 \mathrm{~S}_3 & \text { I. } & \text { Bredig's arc method } \\ \hline \text { (B) } & \mathrm{Au} & \text { II. } & \text { Oxidation } \\ \hline \text { (C) } & \mathrm{S} & \text { III. } & \text { Hydrolysis } \\ \hline \text { (D) } & \mathrm{Fe}(\mathrm{OH})_3 & \text { IV. } & \text { Double decomposition } \\ \hline \end{array} $$

The correct answer is