The energy of an electron of $2p_y$ orbital is

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

The number of correct statements from the following:
$A.$ For $1s$ orbital,the probability density is maximum at the nucleus.
$B.$ For $2s$ orbital,the probability density first increases to maximum and then decreases sharply to zero.
$C.$ Boundary surface diagrams of the orbitals enclose a region of $100\%$ probability of finding the electron.
$D.$ $p$ and $d$-orbitals have $1$ and $2$ angular nodes respectively.
$E.$ Probability density of $p$-orbital is zero at the nucleus.

Which of the following orbitals will have zero probability of finding the electron in the $yz$ plane?

According to the Aufbau principle,what is the correct order of energy for $3d$,$4s$,and $4p$ orbitals?

What is the maximum number of electrons which can be accommodated in an atom in which the highest principal quantum number value is $4$?