The radial probability distribution curve obtained for an orbital wave function $\Psi$ has 3 peaks and 2 radial nodes. The valence electron of which one of the following metals does this wave function $( \Psi )$ correspond to ?

Question

$\begin {array} {1 1} (1)\;Cu & \quad (2)\;Li \\ (3)\;K & \quad (4)\;Na \end {array}$