The correct option is C diethyl ketone
Iodoform test is given by compounds having −COCH3 group.
In acetone −COCH3 group is present. Further ethanol and isopropyl alcohol get oxidised to acetaldehyde and acetone respectively (both having −CH(OH)CH3 group ) in the presence of I2 and they in turn give the test, Thus only diethyl ketone does not give this test. Hence option (c) is correct.