What is the correct order of reactivity of the following alkyl halides towards ammonolysis reaction?

CH3I > CH3Cl > CH3Br CH3I > CH3Br > CH3Cl CH3Br > CH3Cl > CH3I CH3Cl > CH3Br > CH3I

CH3I > CH3Br > CH3Cl

Iodine is the most electropositive atom of chlorine and bromine halogens. This makes it more susceptible to a nucleophilic attack than towards Cl or Br. Hence, CH3I is more reactive towards ammonolysis.