O(2)" and "CO(2) prepared in the laborat...

`O_(2)" and "CO_(2)` prepared in the laboratory can be collected by ……….

A

downward displacement of water and downward displacement of air, respectively

B

downward displacement of water and upward displacement of air, respectively

C

upward displacement of water in both the cases

D

downward displacement of water in both the cases

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The correct Answer is:

B

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