Rotational energy of a diatomic molecule in a given level using Bohr's quantisation condition

1. A.
   $\frac{1}{n^{2}}\frac{h^{2}}{8\pi^{2}I}$
2. B.
   $\frac{1}{n}\frac{h^{2}}{8\pi^{2}I}$
3. C.
   $n\frac{h^{2}}{8\pi^{2}I}$
4. D.
   $n^{2}\frac{h^{2}}{8\pi^{2}I}$

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1. A.
   $\frac{9{\text{ }h}^{2}}{8\pi^{2}I}$
2. B.
   $\frac{3{\text{ }h}^{2}}{8\pi^{2}I}$
3. C.
   $\frac{6{\text{ }h}^{2}}{8\pi I}$
4. D.
   $\ \frac{12{\text{ }h}^{2}}{7\pi^{2}I}$

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1. A.
   $\frac{h}{2I\pi^{2}}$
2. B.
   $\frac{h^{2}}{2I\pi^{2}}$
3. C.
   $\frac{h^{2}}{2I^{2}\pi^{2}}$
4. D.
   $\frac{h}{2I^{2}\pi}$

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1. A.
   $\dfrac{h}{2I\pi^2}$
2. B.
   $\dfrac{h^2}{2I\pi^2}$
3. C.
   $\dfrac{h^2}{2I^2\pi^2}$
4. D.
   $\dfrac{h}{2I^2\pi}$

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