$A$ system goes from $A$ to $B$ via two processes $I$ and $II$ as shown in the figure. If $\Delta U_1$ and $\Delta U_2$ are the changes in internal energies in the processes $I$ and $II$ respectively, then the relation between $\Delta U_1$ and $\Delta U_2$ is
- A$\Delta U_1 = \Delta U_2$
- B$\Delta U_2 < \Delta U_1$
- C$\Delta U_2 > \Delta U_1$
- Dundetermined
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