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A tube is inverted in a mercury vessel a...

A tube is inverted in a mercury vessel as shown in figure. If pressure P is increased, then

`|{:(,"Table-1",,"Table-2"),((A),"Height h",(P),"will increase"),((B),"Pressure at O",(Q),"will decrease"),((C),"Pressure at 1 cm",(R),"will remain same"),(,"above O",,):}|`

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A, B, C
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