An ideal refrigerator has a freezer at a temperature of $-13{ }^{\mathrm{o}}\mathrm{C}$. The coefficient of performance of the engine is $5$. The temperature of the air at which heat is rejected will be

• A

  $325{ }^{\mathrm{o}}\mathrm{C}$
• B

  $325 \mathrm{K}$
• Correct answer
  C

  ${39}^{ \mathrm{o}}\mathrm{C}$
• D

  $320{ }^{\mathrm{o}}\mathrm{C}$

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