Which of the following sequences is correct according to the Aufbau principle?

Which set of quantum numbers is correct for the valence electron of $Na$?

Arrange the following atomic orbitals of multi-electron atoms in order of increasing energy.
$A$. $n=3, l=2, m=+1$
$B$. $n=4, l=0, m=0$
$C$. $n=6, l=1, m=0$
$D$. $n=5, l=1, m=+1$
$E$. $n=2, l=1, m=+1$
Choose the correct answer from the options given below:

Match List-$I$ with List-$II$.

List-$I$ (Quantum Number)	List-$II$ (Information provided)
$A$. $m_l$	$I$. Shape of orbital
$B$. $m_s$	$II$. Size of orbital
$C$. $l$	$III$. Orientation of orbital
$D$. $n$	$IV$. Orientation of spin of electron

Choose the correct answer from the options given below:

The maximum number of electrons that can be accommodated in a shell with $n=4$ is:

Which of the following represents the ground state of an atom?