Mark the correct order of decreasing acid strength of the following compounds.

Options

A. `I gt II gt III`
B. `III gt I gt II`
C. `II gt III gt I`
D. `I gt III gt II`

Answer

B

Explanation

`- NO_(2)` group is electron withdrawing group and increases the acidic strength of phenol while `-CH_(3)` group is electron releasing group and decreases its acidic strength.