An organ pipe filled with oxygen gas at ${47}^{0}C$ resonates in its fundamental mode at frequency 300Hz. If it is now filled with nitrogen gas, at what temperature will it resonate at the same frequency in the fundamental mode?

• A

  $7^{0}C$

• B

  ${27}^{0}C$

• C

  ${87}^{0}C$

• D

  ${107}^{0}C$