Which of the following sets of quantum numbers is not possible?

The correct order of the penetration effect of different orbitals is ..........

If the number of radial nodes in an $s$-orbital is $(n - 1)$,and the question asks for the orbital where the number of nodes is $(n - 1)$,which orbital corresponds to the given expression $(n - 1)$?

What is the meaning of degenerate orbitals?

$A$: The energy of an electron can be determined by the principal quantum number.
$R$: The principal quantum number $(n)$ determines the possible distance of the electron from the nucleus.

The valence electrons in the carbon atom are