Масъала 5 аз 66

A. $\mathrm{C}_{2} \mathrm{H}_{2}$ ва $\mathrm{H}_{2} \mathrm{O}$ B. $\mathrm{C}_{2} \mathrm{H}_{6}$ ва KOH C. $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}$ ва KOH (спирт) D. $\mathrm{C}_{2} \mathrm{H}_{4}$ ва $\mathrm{H}_{2} \mathrm{O}$