At what temperature (in K ) the rms velocity of $\mathrm{SO}_2$ molecules is equal to rms velocity of O, molecules at $27^{\circ} \mathrm{C}$.

• A

  $300$
• B

  $1200$
• Correct answer
  C

  $600$
• D

  $900$

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