Initial pressure and volume of a gas are $P$ and $V$ respectively. First it is expanded isothermally to volume $4V$ and then compressed adiabatically to volume $V$ . The final pressure of gas will be (given $\gamma = 3/2$ ) 
  • A$1\,P$
  • B$2\,P$
  • C$4\,P$
  • D$8\,P$
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