Among the following surfactant molecules, the surfactant that forms micelles in aqueous solution at the lower CMC at ambient condition is

• Correct answer
  A

  $\mathrm{C}{\mathrm{H}}_3{\left(\mathrm{C}{\mathrm{H}}_2\right)}_{15}{\mathrm{N}}^{+}{\left(\mathrm{C}{\mathrm{H}}_3\right)}_3\mathrm{B}{\mathrm{r}}^{-}$
• B

  $\mathrm{C}{\mathrm{H}}_3{\left(\mathrm{C}{\mathrm{H}}_2\right)}_{11}\mathrm{O}\mathrm{S}{\mathrm{O}}_3^{-}\mathrm{N}{\mathrm{a}}^{+}$
• C

  $\mathrm{C}{\mathrm{H}}_3{\left(\mathrm{C}{\mathrm{H}}_2\right)}_6\mathrm{C}\mathrm{O}{\mathrm{O}}^{-}\mathrm{N}{\mathrm{a}}^{+}$
• D

  $\mathrm{C}{\mathrm{H}}_3{\left(\mathrm{C}{\mathrm{H}}_2\right)}_{11}{\mathrm{N}}^{+}{\left(\mathrm{C}{\mathrm{H}}_3\right)}_3\mathrm{B}{\mathrm{r}}^{-}$

Hence, the correct answer is option: 'A'.