The rate equation for the reaction $2A + B \to C$ is found to be : rate $k[A][B]$. The correct statement in relation to this reaction is that the

Question

( A ) unit of $K$ must be $s^{-1}$
( B ) $t_{1/2}$ is a constant
( C ) rate of formation of C is twice the rate of disappearance of A
( D ) values of k is independent of the initial concentration of A and B