Given below are two statements: Statement (I): Oxidising power of halogens decreases in the order $\mathrm{F}_2>\mathrm{Cl}_2>\mathrm{Br}_2>\mathrm{I}_2$, which is the basis of "Layer test". Statement (II): "Layer test" to identify $\mathrm{Br}_2$ and $\mathrm{I}_2$ in aqueous solution involves the oxidation of bromide or iodide into $\mathrm{Br}_2$ or $\mathrm{I}_2$ respectively with $\mathrm{Cl}_2$, which is a type of displacement redox reaction. In the light of the above statements, choose the correct answer from the options given below :