Chemical Kinetics

For a reaction \(3 \mathrm{~A} \rightarrow 2 \mathrm{~B}\)

The average rate of appearance of \(\mathrm{B}\) is given by \(\frac{\Delta[B]}{\Delta t}\). The correct relation between the average rate of appearance of \(\mathrm{B}\) with the average rate of disappearance of A is given in option :