Which of the following sets of quantum numbers is correct for an electron in a $4f$ orbital?

On what does the energy of hydrogen and hydrogen-like species depend? On what does it not depend?

Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom?
$A$. $1s < 2p < 3d < 4s$
$B$. $1s < 2s = 2p < 3s = 3p$
$C$. $1s < 2s < 2p < 3s < 3p$
$D$. $1s < 2s < 4s < 3d$
Choose the correct answer from the options given below:

Choose the correct alternatives. The number of unpaired electrons in an atom of:

Match the items in List-$A$ with the items in List-$B$ and select the correct option.

List-$A$	List-$B$
$(1)$ Principal quantum number	$(A)$ Shape of the orbital
$(2)$ Azimuthal quantum number	$(B)$ Spin of the electron
$(3)$ Magnetic quantum number	$(C)$ Orientation of the orbital in space
$(4)$ Spin quantum number	$(D)$ Size of the orbital

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: