Which one of the following reactions will not yield propionic acid?

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{3}+\mathrm{OI}^{-} / \mathrm{H}_{3} \mathrm{O}^{+}$

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}+\mathrm{KMnO}_{4}$ (Heat), $\mathrm{OH}^{-} / \mathrm{H}_{3} \mathrm{O}^{+}$

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CCl}_{3}+\mathrm{OH}^{-} / \mathrm{H}_{3} \mathrm{O}^{+}$

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}+\mathrm{Mg}, \mathrm{CO}_{2}$ dry ether $/ \mathrm{H}_{3} \mathrm{O}^{+}$