A thermodynamical process is shown in the figure (4). The pressures and volumes corresponding to some points in the fig. (4) are

$\begin{array}{r}{\mathrm{P}}_{\mathrm{A}}=3\times {10}^4{\mathrm{PaV}}_{\mathrm{A}}=2\times {10}^{-3}{\mathrm{m}}^3\\ {\mathrm{P}}_{\mathrm{D}}=8\times {10}^4{\mathrm{PaV}}_{\mathrm{D}}=5\times {10}^{-3}{\mathrm{m}}^3\end{array}$
In the process AB,600 J of heat is added to the system and in process 8C,200 | of heat is added to the system. The change in internal energy of the system in process
AC would be

 

• A

  560 J

• B

  800 J

• C

  600 J

• D

  640 J