Two Containers P and Q of equal volume (1 litre each) contain 6g of $O_2$ and $SO_2$ respectively at $300\;k$ and 1 atmosphere then,

Question

$(a)\;\text{number of molecules in P and Q are same } \\ (b)\;\text{number of molecules in P is less than that in Q } \\(c)\;\text{number of molecules in Q is less than that in P } \\(d)\;\text { none of the abone}$