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Which of the following is drawback of the octet theory?

I. It is clear that octet rule is based upon the chemical inertness of noble gases. However, Some noble gases (for example xenon and krypton) also combine with oxygen and fluorine to form a number of compounds like ${\mathrm{XeF}}_2,{\mathrm{KrF}}_2,{\mathrm{XeOF}}_2\text{ etc. }$
II. This theory does not account for the shape of molecules.
III. It does not explain the relative stability of the molecules being totally silent about energy of a molecule.

Choose the correct option.

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