Given below are two statements:

Statement I : Bohr's theory accounts for the stability and line spectrum of ${\mathrm{Li}}^{+}$  ion.

Statement II : Bohr's theory was unable to explain the splitting of spectral lines in the presence of a magnetic field.

In the light of the above statements, choose the most appropriate answer from the options given below:

• A

  Both statement $\mathrm{I}$ and statement $\mathrm{II}$ are true.
• Correct answer
  B

  Statement $\mathrm{I}$ is false but statement $\mathrm{II}$ is true.
• C

  Both statement $\mathrm{I}$ and statement $\mathrm{II}$ are false.
• D

  Statement $\mathrm{I}$ is true but statement $\mathrm{II}$ is false.

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