Kemija - 2024./25. ljeto - 20.

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

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

C. ${\mathrm{N}}_2\mathrm{O}\backslash mathrm\{N\}\_\{2\}\; \backslash mathrm\{O\}$

D. ${\mathrm{C}\mathrm{H}}_4\backslash mathrm\{CH\}\_\{4\}$