The $pKa$ of a weak acid, $HA$ is $4.80$ . The $pKb$ of a weak base BOH is $4.78$. The PH of an aqueous solution of the corresponding salt, BA will be

Question

$\begin{array}{1 1} 7.01 \\ 9.22 \\ 9.58 \\ 4.79 \end{array} $