Kemija - 2022. jesen, 19.

A. ${\mathrm{O}}_2\backslash mathrm\{O\}\_\{2\}$

B. ${\mathrm{O}}_3\backslash mathrm\{O\}\_\{3\}$

C. $\mathrm{C}\mathrm{O}\backslash mathrm\{CO\}$

D. ${\mathrm{C}\mathrm{O}}_2\backslash mathrm\{CO\}\_\{2\}$