Consider the following.
I. The electron spin quantum number describes the orientation of the spin of the nucleus with respect to the magnetic field.
II. The orbitals represented by the quantum numbers $n=3, l=2, m=+2$ and $n=3, l=2, m=-2$ have the same energy.
III. The energy of a photon is directly proportional to wavelength but inversely proportional to wave number.
IV. Lyman series of lines appear in ultra-violet region.
The correct statements are
In which of the following options, the elements are correctly arranged with respect to their negative electron gain enthalpies?
Identify the option in which the molecules are arranged in the correct order of their dipole moments
The bond order of $\mathrm{O}_2^{+}$is $x$. The bond orders of $\mathrm{O}_2^{-}$and $\mathrm{O}_2^{2+}$ are respectively