The inverse of the following statement If $x=3,$ then $x^2=9$ is

Question

$\begin{array}{1 1} If \;x^2=9,then \;x=3 \\If \;x \neq 3,then \;x^2 \neq 3 \\ If \;x^2=9,then \;x \neq 3 \\ none\;of\; these \end{array}$