A system goes from A to B via two processes I and II as shown in figure. If $∆{\mathrm{U}}_1$ and $∆{\mathrm{U}}_2$ are the changes in internal energies in the processes I and II respectively then

• A

  $∆{\mathrm{U}}_1=∆{\mathrm{U}}_2$

• B

  relation between $∆{\mathrm{U}}_1 \mathrm{and} ∆{\mathrm{U}}_2$ cannot be determined

• C

  $∆{\mathrm{U}}_2>∆{\mathrm{U}}_1$

• D

  $∆{\mathrm{U}}_2<∆{\mathrm{U}}_1$