The incorrect statements among the following for sigma- and pi- bonds formed between two carbon atoms is:

 ${\mathrm{p}}_{\mathrm{\pi }}-{\mathrm{d}}_{\mathrm{\pi }}$ bonding is present in:

1. ${\mathrm{NO}}_3^{-}$

2. ${{\mathrm{SO}}_3}^{-2}$

3. ${{\mathrm{BO}}_3}^{-3}$

4. ${{\mathrm{CO}}_3}^{-2}$

In NO₃^– ion, the number of bond pair and lone pair of electrons on nitrogen atom are respectively:

d$\mathrm{\pi }$ - p$\mathrm{\pi }$ bond is present in:

1. $C{O}_3^{2-}$

2. $P{O}_4^{-3}$

3. $N{O}_3^{-}$

4. $N{O}_2^{-}$