Statement-I: The electronic structure of azide ion $\left({{\mathrm{N}}_3}^{-}\right)$ is $[:\ddot{\mathbf{N}}\leftarrow \mathbf{N}\equiv \mathbf{N}:{]}^{-}$

Statemeot-2 is not a resonating structure of azide ion, because the position of atoms cannot be changed.

Statement-I is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-I.

Statement-I is True, Statement-2 is True, Statement-2 
Is NOT a correct explanation for Statement-I.

Statement-I is True, Statement-2 is False

Statement-I is False, Statement-2 is True.