In case of an adiabatic process the correct relation in terms of pressure $p$ and density $\rho $ of a gas is
  • A$p \,{\rho ^\gamma } =$ constant
  • B$p ^\gamma \,{\rho ^{\gamma-1}} =$ constant
  • C$p \,{\rho ^{\gamma-1}} =$ constant
  • D$p \,{\rho ^{ - \gamma }} =$ constant
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