For the reaction $A+3b \rightarrow 2C+D$, which one of the following is not correct?

Question

(1) Rate of disappearance of A = Rate of formation of D.

(2) Rate of formation of $C = \large\frac{2}{3} \times$ Rate of disappearance of B

(3) Rate of formation of $D.= \large\frac{1}{3}\times$ Rate of disappearance of B

(4) Rate of disappearance of $A = 2 \times$ .Rate of formation of C.