Four 1-1 litre flasks are seperately filled with the gases `H_(2)`, He and `O_(2)` and `O_(3)` at the same temperature and pressure. The ratio of total number of atomsof these gases present in different flask would be:
A. `1:1:1:1`
B. `1:2:2:3`
C. `2:1:2:3`
D. `3:2:2:1`
