For a reaction `1//2A to 2B`, rate of disappearance of A is related to the rate of appearance of B by the expression:

Options

A. `(-d[A])/(dt)=(1)/(2)(d[B])/(dt)`
B. `(-d[A])/(dt)=4(d[B])/(dt)`
C. `(-d[A])/(dt)=(1)/(4)(d[B])/(dt)`
D. `(-d[A])/(dt)=(d[B])/(dt)`.