Carnot cycle (reversible) of a gas represented by a Pressure-Volume curve is shown in the diagramConsider the following statements

$I.$ Area $ABCD =$ Work done on the gas

$II.$ Area $ABCD =$ Net heat absorbed

$III.$ Change in the internal energy in cycle $= 0$

Which of these are correct

  • A$I$ only
  • B$II$ only
  • C$II$ and $III$
  • D$I, II$ and $III$
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