The wave length of a photon needed to remove a proton from a nucleus which is bound to the nucleas with 1 Mev energy is nearly

Question

$\begin{array}{1 1} 1.2\;nm \\ 1.2 \times 10^{-3} \;nm \\ 1.2 \times 10^{-6}\;nm \\ 1.2 \times 10^1\;nm \end{array} $