If $\Delta \lambda_L$ is the difference between shortest and longest wavelengths of Lymann series and $\Delta \lambda_B$ is the difference between shortest and longest wavelengths of Balmer series, then $\frac{\Delta \lambda_B}{\Delta \lambda_L}=$

• A

  2.4
• B

  4.8
• C

  7.2
• Correct answer
  D

  9.6

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