Consider the following reaction and identify A and B : $\text{CH}_3\text{Cl} + \text{NaI} \xrightarrow{\text{dry acetone}} \text{A} + \text{B}$ (A) $\text{A} = \text{CH}_3\text{I}, \text{B} = \text{NaCl}$ (B) $\text{A} = \text{CH}_3\text{OH}, \text{B} = \text{NaCl}$ (C) $\text{A} = \text{CH}_3\text{CHO}, \text{B} = \text{NaCl}$ (D) $\text{A} = \text{C}_2\text{H}_6, \text{B} = \text{CH}_3\text{I}$