How many maximum electrons can be accommodated in a $p$-orbital with $n = 6$ and $m = 0$?

For a hydrogen atom,the orbital$(s)$ with the lowest energy is/are:
$A$. $4s$
$B$. $3p_x$
$C$. $3d_{x^2-y^2}$
$D$. $3d_{z^2}$
$E$. $4p_z$
Choose the correct answer from the options given below:

In an atom, the order of increasing energy of electrons with quantum numbers $(i)$ $n=4, l=1$, (ii) $n=4, l=0$, (iii) $n=3, l=2$, and (iv) $n=3, l=1$ is:

Find the number of electron pairs in $P$ atom with $l = 1$ and $m = 0$.

Which of the following electronic configurations is closer to the nucleus: $4s^2 3d^{10}$ or $4s^0 3d^{10}$?

Which of the following arrangements shows the correct order of decreasing paramagnetism?