The acceleration of electron in the first orbit of hydrogen atom is (where the symbols have their usual meanings)

• A

  $\frac{4{\pi }^{2}m}{h^3}$
• B

  $\frac{h^2}{4{\pi }^{2}mr}$
• Correct answer
  C

  $\frac{h^2}{4{\pi }^2{m}^2{r}^3}$
• D

  $\frac{m^2{h}^2}{4{\pi }^2{r}^3 }$

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