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In the given figure, atmospheric pressur...

In the given figure, atmospheric pressure `p_0 = 1` atm and mercury column length is 9 cm. Pressure p of the gas enclosed in the tube is

A

Pressure of 67 cm of Hg

B

Pressure of 90 cm of Hg

C

Pressure of 78 cm of Hg

D

Pressure of 85 cm of Hg

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The correct Answer is:
D
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