In a hypothetical hydrogen like atom, if transition of electron from $n=4$ to $n=3$ produces visible light, then the possible transition to obtain infrared radiation is

• A

  $n=5$ to $n=3$
• B

  $n=4$ to $n=2$
• C

  $n=3$ to $n=1$
• Correct answer
  D

  $n=5$ to $n=4$

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