Four one litre flasks are separately filled with the gases hydrogen, helium , oxygen and ozone at the same room temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be

Question

$(a)\;1:1:1:1 \\ (b)\;1:2:2:3 \\(c)\;2:1:2:3 \\(d)\;3:2:2:1$