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Four ten litre flasks are separately fil...

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

A

`1:2:3:2`

B

`2:1:2:3`

C

`1:3:2:2`

D

`1:1:1:1`

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The correct Answer is:
B
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