The ratio of the difference in energy between the first and second Bohr orbit to that between the second and the third Bohr orbit is

Question

$\begin{array}{1 1} (a)\;\large\frac{1}{2} \\ (b)\;\large\frac{1}{3} \\ (c)\;\large\frac{4}{9} \\(d)\;\large\frac{27}{5} \end{array}$