The correct option is A Sodium lauryl sulphate
Any detergent in which lipophilic part of the molecule is an anion is called an anionic detergent.
a) Here Sodium lauryl sulphate is an anionic detergent.
b) Cetyltrimethyl ammonium bromide is a popular cationic detergent.
c) Glyceryl oleate is the ester of glycerin.
d) Sodium stearate is the sodium salt of stearic acid.