Which of the following does not have coordinate bond?

A. $\mathrm{SO}_2$ (Sulfur Dioxide) 1. Sulfur has 6 valence electrons and each oxygen has 6 valence electrons. 2. In $\mathrm{SO}_2$, sulfur forms two double bonds with two oxygen atoms. 3. One of the oxygen atoms can donate a lone pair to sulfur, forming a coordinate bond. 4. Therefore, $\mathrm{SO}_2$ has a coordinate bond. B. $\mathrm{HNO}_3$ (Nitric Acid) 1. Nitrogen has 5 valence electrons, each oxygen has 6, and hydrogen has 1. 2. In $\mathrm{HNO}_3$, nitrogen forms one double bond with one oxygen and single bonds with the other oxygen and hydrogen. 3. The nitrogen can use a lone pair to form a coordinate bond with one of the oxygens. 4. Therefore, $\mathrm{HNO}_3$ has a coordinate bond. C. $\mathrm{H}_2 \mathrm{SO}_3$ (Sulfurous Acid) 1. Sulfur has 6 valence electrons, each oxygen has 6, and hydrogen has 1. 2. In $\mathrm{H}_2 \mathrm{SO}_3$, sulfur forms two single bonds with two hydroxyl groups ((\mathrm{OH})) and one double bond with an oxygen atom. 3. The sulfur can donate a lone pair to form a coordinate bond with the remaining oxygen. 4. Therefore, $\mathrm{H}_2 \mathrm{SO}_3$ has a coordinate bond. D. $\mathrm{HNO}_2$ (Nitrous Acid) 1. Nitrogen has 5 valence electrons, each oxygen has 6, and hydrogen has 1. 2. In HNO 2, nitrogen forms one double bond with one oxygen and a single bond with the hydroxyl group (OH). 3. The nitrogen does not have a lone pair available to donate to form a coordinate bond. 4. Therefore, $\mathrm{HNO}_2$ does not have a coordinate bond. Conclusion The compound that does not have a coordinate bond is $\mathrm{HNO}_2$.