The structure II is most acceptable canonical form of aniline The structure II is acceptable because it is non-aromatic The structure II is unacceptable because here N atom has 10 VALENCE electrons The structure II is acceptable because here N atom has 10 valence electrons.
Solution :In structure (II) nitrogen has 10 valence electrons. As N (a second period ELEMENT) cannot EXPAND its octet, it cannot has 10 electrons in its valence shell.