Chemical Bonding And Molecular Structure

$\mathrm{CO}_3^{2-}<\mathrm{CO}_2<\mathrm{CO}$

$\mathrm{CO}_2 \leqslant \mathrm{CO}_3^{2-}<\mathrm{CO}$

$\mathrm{CO}<\mathrm{CO}_3^{2-}<\mathrm{CO}_2$

$\mathrm{CO}<\mathrm{CO}_2<\mathrm{CO}_3^{2-}$