Explanation

(a) If an electron and a proton propagating in the form of waves and their wavelength are same, then according to the relation
$E = \frac{hc}{\lambda}$
Also, $\lambda_{electron} = \lambda_{proton}$
$\therefore\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ E_{e} = E_{p}$
Hence, their energies are same.