Which of the following alkyl halides is not hydrolyzed by S_N2 mechanism ?

Given data : It is given to identify which of the following alkyl halides is not hydrolyzed by S_N2 mechanism

Explanation

A nucleophilic substitution in which the rate-determining step has two components. Bond formation and breakage occur concurrently during - $S_{N}2$ bimolecular processes.

The rate of the $S_{N}2$ mechanism depends upon better innovation of nucleophiles and the steric hindrance and lower than the steric, and this is easy to attack. 

Hence, the correct option  (D). ${\left(C{H}_3\right)}_{3}CBr$.