In which one of the following pairs,the species have similar geometry

Question

$\begin{array}{1 1}(a)\;CO_2\;and\;SO_2&(b)\; CO_3^{2-}\;and\;SO_3^{2-}\\(c)\;SO_4^{2-}\;and\;ClO_4^-&(d)\;PH_3\;and\;BH_3\end{array}$