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Four flasks of 1 litre capacity each are...

Four flasks of 1 litre capacity each are separately filled with gases `H_(2),He,O_(2)` and `O_(3)`. At the same tempearture and present the ratio of the number of atoms of these gases present is different flasks would be:

A

`1:1:1:1`

B

`2:1:2:3`

C

`1:2:1:3`

D

`3:2:2:1`

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The correct Answer is:
B
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