$P_i, V_i$ and $P_f$, $V_f$ are initial and final pressures and volumes of a gas in a thermodynamic process respectively. If $PV^n =$ constant, then the amount of work done is 
  • Aminimum for $n = \gamma $
  • Bminimum for $n = 1$
  • Cminimum for $n = 0$
  • Dminimum for $n = \infty $
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