Which of the following compounds would be hydrolyzed most easily?

Given data : It is given to identify the compound which can be easily hydrolyzed by water from the given options. 

Explanation:

The term "hydrolyze" is derived from the Greek words hydro and lysis, which mean "water break." 

Since the $C-I$ bond is the weakest and $I^{-}$is a better leaving than $B{r}^{-}, C{l}^{-} and F^{-}$ ions so the compound which has Iodine can be hydrolyzed more easily.

Therefore, $C_2{H}_{5}I$ is the most reactive among the given alkyl halides.

Hence, the correct option (D).$C_2{H}_{5}I$