For the reaction, 4A + B → 2C + 2D, the statement which is not correct, is :
(a) the rate of formation of D is half the rate of consumption of A
(b) the rates of formation C and D are equal
(c) the rate of disappearance of B is one fourth the rate of disappearance of A
(d) the rate of disappearance of C is half the rate of disappearance of B