Degenerate atomic orbitals have

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:

"No two electrons in an atom can have the same set of all four quantum numbers." This principle is called:

For hydrogen-like atoms,the average distance of an electron from the nucleus for the orbitals belonging to the $4^{th}$ orbit is minimum for:

Which two orbitals are located along the axes and not between the axes?

How are atomic orbitals (electrons) identified or distinguished?