What is the total number of unpaired electrons present in the observed electronic configuration of $Cr$ $(Z=24)$?

The graph between $|\psi|^2$ and $r$ (radial distance) is shown below. This represents

Given below are two statements:
Statement $I$ : For a given shell,the total number of allowed orbitals is given by $n^2$.
Statement $II$ : For any subshell,the spatial orientation of the orbitals is given by $-l$ to $+l$ values including zero.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following is the correct electronic configuration of $Cr$ (Chromium)?

If there are $2$ nodal surfaces in the third excited state,find the orbital angular momentum.

The allowed set of quantum numbers for an electron in a hydrogen atom is