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P - V diagram of a cyclic process ABCA i...

`P - V` diagram of a cyclic process `ABCA` is as shown in Fig. Choose the correct alternative

A

`DeltaQ_(AtoB)=`negative

B

`DeltaU_(BtoC)=`positive

C

`DeltaQ_(AtoB)=`negative

D

All of these

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The correct Answer is:
D
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