For a reaction $\frac{1}{2}\rightarrow 2B$ rate of disappearance of ‘A’ is related to the rate of appearance of ‘B’ by the expression

Question

( A ) $-\frac{d[A]}{dt}=\frac{d[B]}{dt}$
( B ) $-\frac{d[A]}{dt}=4\frac{d[B]}{dt}$
( C ) $\frac{d[A]}{dt}=\frac{1}{4}\frac{d[B]}{dt}$
( D ) $-\frac{d[A]}{dt}=\frac{1}{2}\frac{d[B]}{dt}$