The P-V diagram of a system undergoing t...

The `P-V` diagram of a system undergoing thermodynnaic transformation is shown in Fig. The work done on the system in going from `A rarr B rarr C` is `50 J` and `20 cal` heat is given to the system. The change in internal erergy between `A` and `C` is

`34J`

`70J`

`84J`

`134J`

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