4.4g of $CO_2$ and $2.24$ litre of $H_2$ at STP are mixed in a container.The total number of molecules present in the container will be

Question

$\begin{array}{1 1}(a)\;6.022\times 10^{23}&(b)\;1.2044\times 10^{23}\\(c)\;2\;mole&(d)\;6.023\times 10^{24}\end{array}$