Consider the following anions.

When attached to sp -hybridized carbon, their leaving group ability in nucleophilic substitution reaction decreases in the order :

Options

A. `I gt II gt III gt IV`
B. ` I gt II gtIV gt III`
C. `IV gt I gt II gt III`
D. `IV gt III gt II gtI`

Answer

B

Explanation

`CH_(3)- overset(O)overset(||)underset(O)underset(||)S-O^(Theta) gt Ph- overset(O)overset(||)underset(O)underset(||)S-O^(Theta)gt CH_3 -COO^(Theta) gt PhO^(Theta)`