An ideal diatomic gas of $n$ moles and with initial pressure $P$ and volume $V$ undergoes a thermodynamic process. In this process the pressure is directly proportional to volume and the rms speed of the molecules is doubled. Then, the amount of heat required in this process is

• Correct answer
  A

  $9 n P V$
• B

  $3 n P V$
• C

  $6 n P V$
• D

  $n P V$

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