The total random kinetic energy of $1 \mathrm{~g}$ of helium at $100 \mathrm{~K}$ will be $\left(\mathrm{R}=8.3 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right)$

• A

  $622.50 \mathrm{~J}$
• Correct answer
  B

  $311.25 \mathrm{~J}$
• C

  $155.62 \mathrm{~J}$
• D

  $415.00 \mathrm{~J}$

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