question_answer
Which order is correct for the decreasing reactivity to ring monobromination of the following compounds \[\begin{align} & {{C}_{6}}{{H}_{5}}C{{H}_{3}}, \\ & \,\,\,\,\,\,\,\,\,\,\text{I} \\ \end{align}\] \[\begin{align} & {{C}_{6}}{{H}_{5}}COOH, \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\text{II} \\ \end{align}\] \[\begin{align} & {{C}_{6}}{{H}_{6}} \\ & \,\,\,\,\text{III} \\ \end{align}\] \[\begin{align} & {{C}_{6}}{{H}_{5}}N{{O}_{2}} \\ & \,\,\,\,\,\,\,\,\,\,\text{IV} \\ \end{align}\]