A quantity of monoatomic gas undergoes a process in which pressure is changed linearly with volume. The pressure and volume are changed from initial value $\left(\mathrm{P}_{\mathrm{o}}, \mathrm{V}_{\mathrm{o}}\right)$ to final value $\left(3 \mathrm{P}_{\mathrm{o}}, 3 \mathrm{~V}_{\mathrm{o}}\right)$. The heat absorbed by the gas during process is

• A

  $8 \mathrm{P}_{\mathrm{o}} \mathrm{V}_{\mathrm{o}}$
• B

  $12 \mathrm{P}_{\mathrm{o}} \mathrm{V}_{\mathrm{o}}$
• Correct answer
  C

  $16 \mathrm{P}_{\mathrm{o}} \mathrm{V}_{\mathrm{o}}$
• D

  $20 \mathrm{P}_{\mathrm{o}} \mathrm{V}_{\mathrm{o}}$

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