In an experiment on photoelectric effect photons of wavelength 300 nm eject electrons from a metal of work function 2.25 eV . A photon of energy equal to that of the most energetic electron corresponds to the following transition in the hydrogen atom:

• A

  $n=2$ to $n=1$ state.
• B

  $n=3$ to $n=1$ state.
• Correct answer
  C

  $n=3$ to $n=2$ state.
• D

  $n=4$ to $n=3$ state.

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