The ratio of the efficiencies of two Carnot engines A and B is 1.25 and the temperature difference between the source and the sink is same in both the engines. The ratio of the absolute temperature of the sources of the engines $A$ and $B$ is

• Correct answer
  A

  $2: 3$
• B

  $2: 5$
• C

  $3: 4$
• D

  $4: 5$

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