[" For a reaction,"I^(-)+OCl^(-)rarr IO^(-)+Cl^(-)" in an aqueous medium,the rate of reaction is given "b],[(d[IO]^(-))/(dt)=k([I^(-)][OCl^(-)])/([OH^(-)])." The overall order of reaction is "],[[" (1) "-1," (2) "0," (3) "1," (4) "2]]