Kemija - 2009./10. jesen - 19.

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

B. $\mathrm{CO}_{2}$

C. $\mathrm{SO}_{2}$

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