The correct order of reactivity of hydrolysis of acid chlorides is

The correct order of reactivity of hydrolysis of acid chlorides is $p-{\mathrm{O}}_2{\mathrm{NC}}_6{\mathrm{H}}_4\mathrm{COCl}>\mathrm{PhCOCl}>p-{\mathrm{CH}}_3{\mathrm{OC}}_6{\mathrm{H}}_4\mathrm{COCl}$

One of the lone pairs on the oxygen of a water molecule attacks the relatively positive carbon atom in acid chloride in a nucleophilic reaction during hydrolysis.The attack will be more reactive with more positive carbon. a "NO" is presentThe M effect of ${\mathrm{NO}}_2$ makes the $p-{\mathrm{O}}_2{\mathrm{NC}}_6{\mathrm{H}}_4\mathrm{COCl}>\mathrm{PhCOCl}>p-{\mathrm{CH}}_3{\mathrm{OC}}_6{\mathrm{H}}_4\mathrm{COCl}$ of ${\mathrm{NO}}_2{\mathrm{C}}_6{\mathrm{H}}_4\mathrm{COCl}$ more positive and reactive. The C is less reactive and positive when there is a +M effect.

Hence, option C is correct.