Given below is the decomposition of hydrogen peroxide in alkaline medium, which is catalysed by iodide ions : $2\text{H}_2\text{O}_2 \xrightarrow{\text{I}^-, \text{alkaline medium}} 2\text{H}_2\text{O} + \text{O}_2$ The above reaction takes place in two steps : Step I : $\text{H}_2\text{O}_2 + \text{I}^- \longrightarrow \text{H}_2\text{O} + \text{IO}^-$ (slow) Step II : $\text{H}_2\text{O}_2 + \text{IO}^- \longrightarrow \text{H}_2\text{O} + \text{I}^- + \text{O}_2$ Molecularity of Step I and Step II is : (a) Step I – 2, Step II – 2 (b) Step I – 1, Step II – 2 (c) Step I – 2, Step II – 1 (d) Step I – 3, Step II – 1