In the reaction <br> $BrO{_3}{^-}(aq)+5Br^-(aq)+6H^+\rightarrow 3Br_2(l)+3H_2O(l)$ <br> The rate of appearance of bromine ($Br_2$ ) is related to rate of disappearance of bromide ions as following

Question

( A ) $\frac {d(Br_2)}{dt}=\frac{3}{5}\frac {d(Br^-)}{dt}$
( B ) $\frac {d(Br_2)}{dt}=-\frac{5}{3}\frac {d(Br^-)}{dt}$
( C ) $\frac {d(Br_2)}{dt}=\frac{5}{3}\frac {d(Br^-)}{dt}$
( D ) $\frac {d(Br_2)}{dt}=-\frac{3}{5}\frac {d(Br^-)}{dt}$