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Initial pressure and volume of a gas are...

Initial pressure and volume of a gas are P and V respectively. First it is expanded isothermally to volume 4 V and then compressed adiabatically to volume V. The final pressure of gas will be (given `gamma=(3)/(2)`)

A

1p

B

2p

C

4p

D

8p

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The correct Answer is:
B
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