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Graph $A-B$ is an adiabatic curve. Choose the correct statement
  • AProcess $AC$ and $BC$ , both are exothermic
  • BProcess $AC$ and $BC$ , both are endothermic
  • CProcess $AC$ is endothermic, $BC$ is exothermic
  • DProcess $AC$ is exothermic, $BC$ is endothermic
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