Which of the following is used as a thickening agent in dentifrices?: (A) Calcium Carbonate, Calcium Phosphate and Calcium Sulphate, (B) Sodium Bicarbonate, Aluminium Oxide, (C) Sodium Lauryl Sulphate and Sodium Lauryl Succinate, (D) Carboxymethyl Cellulose, alginate amylase
Answer is D. None