If the internal energy of 3 moles of a gas at a temperature of $27^{\circ} \mathrm{C}$ is 2250 R, then the number of degrees of freedom of the gas is (R - Universal gas constant)

• A

  $3$
• Correct answer
  B

  $5$
• C

  $4$
• D

  $6$

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