Which of the following is an anionic detergent?

A. Anionic detergent: {\text{CH}_{3} - {( {\text{CH}_{2} )}_{10} - {\text{CH}_{2} - \text{O} - \overset{O}{\overset{| |}{\mathop{\mathop{S}_{| |}}_{O}}} - O^{⊖} {\text{Na}^{⊕}

Sodium Lauryl sulphate is example of anionic detergent.

These are sodium salts of sulphonated long chain alcohols or hydrocarbons.

{\text{CH}_{3} - {\left({\text{CH}_{2}\right)}_{10} - {\text{CH}_{2} - \text{OH}\overset{{H}_{2} {\text{SO}_{4} \left(\text{conc}.\right)}{→} {\text{CH}_{3} - {\left({\text{CH}_{2}\right)}_{10} {\text{CH}_{2} - \text{O} - \overset{O}{\overset{| |}{\mathop{\mathop{S}_{| |}}_{O}}} - \text{OH}\overset{\text{NaOH}\left(\text{aq}\right)}{→}

{\text{CH}_{3} - {( {\text{CH}_{2} )}_{10} - {\text{CH}_{2} - \text{O} - \overset{O}{\overset{| |}{\mathop{\mathop{S}_{| |}}_{O}}} - O^{⊖} {\text{Na}^{⊕}

Sodium lauryl sulphate (anionic detergent)

B. Cationic detergent:

Cetyle trimethyl ammonium bromide is an example of cationic detergent.

C. ${C}_{17}{H}_{35}C{O}_{2}Na$ : Sodium sterarate (soap)