The number of $\sigma$-bonds and $\pi$-bonds in $XeO_4$ are

Question

$\begin{array}{1 1}(a)\;4\sigma\text{ bonds and }o\pi\text {bonds}\\(b)\;4\sigma\text{ bonds and }4\pi\text {bonds}\\(c)\;2\sigma\text{ bonds and }2\pi\text {bonds}\\(d)\;0\sigma\text{ bonds and }4\pi\text {bonds}\end{array}$