A Carnot engine has the same efficiency between (i) $100 \mathrm{K}$ and $500 \mathrm{K}$, (ii) $\mathrm{T} \mathrm{K}$ and $900 \mathrm{K}$. The value of $\mathrm{T}$ is

• Correct answer
  A

  $180\mathrm{ }\mathrm{K}$
• B

  $90\mathrm{ }\mathrm{K}$
• C

  $270\mathrm{ }\mathrm{K}$
• D

  $360\mathrm{ }\mathrm{K}$

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