Option (1): Cetyltrimethylammonium bromide is a popular cationic detergent used in hair conditioner. Option (2): Non-ionic detergents are formed when polyethylene glycol reacts with stearic acid. Option (3): sodium dodecyl benzene sulphonate used in tooth paste is an anionic detergent. Option (4): Sodium lauryl sulphate is an anionic detergent which do not forms an insoluble scum with hard water.