Kemija - 2013./14. jesen - 35.

A. ${\mathrm{C}\mathrm{N}}^{-}\mathrm{i}\mathrm{H}\mathrm{C}\mathrm{N}\backslash mathrm\{CN\}^\{-\}\; \backslash mathrm\{iHCN\}$

B. ${\mathrm{C}\mathrm{N}}^{-}\mathrm{i}\mathrm{O}\mathrm{H}{}^{-}\backslash mathrm\{CN\}^\{-\}\; \backslash mathrm\{iOH\}\{\; \}^\{-\}$

C. ${\mathrm{H}}_2{\mathrm{O}\mathrm{i}\mathrm{O}\mathrm{H}}^{-}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{OiOH\}^\{-\}$

D.${\mathrm{H}}_2\mathrm{O}\mathrm{i}\mathrm{H}\mathrm{C}\mathrm{N}\backslash mathrm\{H\}\_2\; \backslash mathrm\{O\}\; \backslash mathrm\{i\}\; \backslash mathrm\{HCN\}$