A graph between $1/[A]^2$ vs t is plotted below where [A] is conc of [A] at time t and $[A_o]$ is initial conc and K is the rate constant of a $Rx^n$ $nA\rightarrow$ product. What is the initial concentration of [A]

Question

$(a)\;2\qquad(b)\;1\qquad(c)\;0\qquad(d)\;None$