pka value of CH3COOH is 4.78. Which of the following statement is correct (A) pH of 0.1 M CH;COOH is 4.78 (B) pH = 4.78 then degree of dissociation of CH3COOH is maximum (C) pH = 4.78 then degree of dissociation of C'H3COOH is minimum (D) pH = 4.78 then 50% CH3 COOH is dissociation