Sandmeyer's reaction cannot be used in the preparation of

C6H5-N2+Cl-→Cu2Cl2/HClC6H5Cl ; C6H5-N2+Cl-→Cu2Br2/HBrC6H5Br ; C6H5-N2+Cl-→Cu2CN2/KCNC6H5CN; The above reactions are examples of sandmeyer's reaction  but the reaction below is not. C6H5-N2+Cl-→KIC6H5I ;