Kemija - 2009./10. jesen - 24.

A. ${\mathrm{H}}_2{\mathrm{C}\mathrm{O}}_3\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{CO\}\_\{3\}$

B. ${\mathrm{C}\mathrm{O}}_3{}^{2-}\backslash mathrm\{CO\}\_\{3\}\{\; \}^\{2-\}$

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

D. ${\mathrm{O}\mathrm{H}}^{-}\backslash mathrm\{OH\}^\{-\}$