Two moles of a triatomic gas $\left(\gamma=\frac{4}{3}\right)$ at temperature $327^{\circ} \mathrm{C}$ expands adiabatically such that its volume becomes 8 times its initial volume. Later the temperature of the gas is doubled in an isochoric process. The total work done in the two processes is ( $\mathrm{R}$ - universal gas constant)

• A

  $900 \mathrm{R}$
• Correct answer
  B

  $1800 \mathrm{R}$
• C

  $1200 \mathrm{R}$
• D

  $300 \mathrm{R}$

Hence, the correct answer is option: 'B'.