The `P-V` diagram of a system undergoing thermodynnaic transformation is shown in Fig. The work done on the system in going from

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

A. `34J`
B. `70J`
C. `84J`
D. `134J`

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

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