One gram of a monobasic acid when dissolved in 100 g of water lowers the freezing point by 0.186°C. Now, 0.25 g of the same acid are dissolved and titrated with 15.1 mL of N/10 alkali. The degree of dissociation of the acid is (Kf(H2O) = 1.86)
(a) 1.66
(b) 0.66
(c) 0.11
(d) 0.060
