Find out the descending order of roman number $IX, IV, VI, XII$ is

Question

$\begin{array}{11} (a)\; \text{VI, XII, IV, IX} \\ (b)\; \text{IV, VI, IX, XII} \\ (c)\; \text{ XI, IX, VI, IV} \\ (d)\; \text{IX, XI, VI, IV} \end{array}$