For an irreversible reaction $A \to 2B$ , the rate is increased by four times when the concentration of A is doubled. The incorrect statement about this reaction is

Question

$\begin{array}{1 1}\text{It is a second order reaction } \\ \text{Half line is independent of initial concentration of A} \\ \text{The unit of the specific rate k is} L\; mol ^{-1}s^{-1} \\ \text{Half line is inversly related to the initial concentration of A. } \end{array} $