The micelle formed by sodium sterate in water has `-COO^-` group at the surface.
(r) Surface tension of water is reduced by the addition of stearate.
A. IF both (A) and (r) are correct and (r) is the correct explanation for (a).
B. If both (a) and (r) are correct but (r) is not the correct explanation for (a).
C. IF (a) is correct but (r) is incorrect.
D. If (a) is incorrect but (r) is correct.
