A thermodynamic system is taken from an original state $D$ to an intermediate state $E$ by the linear process shown in the figure. Its volume is then reduced to the original volume from $E$ to $F$ by an isobaric process. The total work done by the gas from $D$ to $E$ to $F$ will be

• A

  $-450 \mathrm{J}$
• Correct answer
  B

  $450 \mathrm{J}$
• C

  $900 \mathrm{J}$
• D

  $1350 \mathrm{J}$

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