If the total energy of an electron in a hydrogen like atom in an excited state is -3.4eV then the debroglie wavelength of the electron is

Question

$\begin{array}{1 1}(a)\;6.6\times 10^{-10}&(b)\;3\times 10^{-10}\\(c)\;5\times 10^{-9}&(d)\;9.3\times 10^{-12}\end{array}$