Among the following, which surfactant will form micelles in aqueous solution at the lowest molar concentration at ambient conditions?
(a)`CH_(3)(CH_(2))_(15)N^(o+)(CH_(3))_(3)Br^(Θ)`
(b)`CH_(3)(CH_(2))_(11)OSO_(3)^(Θ)Na^(o+)`
(c)`CH_(3)(CH_(2))_(6)COO^(Θ)Na^(o+)`
(d)`CH_(3)(CH_(12))_(11)N^(o+)(CH_(3))_(3)Br^(Θ)`

Options

A. `CH_(3)-(CH_(2))_(8)-COO^(-)Na^(+)`
B. `CH_(3)(CH_(2))_(11)overset(o+)N (CH_(3))_(3)Br^(-)`
C. `CH_(3)-(CH_(2))_(13) - OSO_(3)^(-)Na^(+)`
D. `CH_(3)(CH_(2))_(15)overset(o+)N (CH_(3))_(3)Br^(-)`

Answer

D