Which of the following represents a synthetic detergent

• A. \[{{C}_{15}}{{H}_{31}}COOK\]
• B. \[C{{H}_{3}}{{[C{{H}_{2}}]}_{16}}COONa\]
• C. \[{{C}_{12}}{{H}_{25}}\]\[S{{O}_{3}}Na\]
• D. None of these