When the momentum of a photon is chagned by an amount $p\text{'}$ then the corresponding change in the de-Broglie wavelength is found to be $0.2\%$. Then, the original momentum of the photon was

• A

  $300p\prime$
• Correct answer
  B

  $500p\prime$
• C

  $400p\prime$
• D

  $600p\prime$

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