Kemija - 2013./14. ljeto - 14.

A. $3{\mathrm{O}}_{3}3\; \backslash mathrm\{~O\}\_\{3\}$

B. $3\mathrm{O}3\; ~\backslash mathrm\{O\}$

C. $3{\mathrm{O}}_{2}3\; \backslash mathrm\{~O\}\_\{2\}$

D. $3{\mathrm{O}}_2{}^{2-}3\; \backslash mathrm\{~O\}\_\{2\}\{\}^\{2-\}$