in the first place, note that soaps are made up of either animal or vegetable fats. while chemically soaps are sodium or potassium salts of long chain CARBXYLIC ACIDS, THE DETERGENTS are sodium salts of long chain benzene sulphonic acids. moreover, some detergents are not biodegradable .... hence only two stateemnts are correct.

Questions is asking about not true answer but options is not given accordingly

DETERGENT ARE BENZENE SULPHONIC ACID