Considere os compostos orgânicos a seguir.

!$ H_3 \, C-CH_2 \, -CHO \,\,\,\,\,\, H_3 \, C-CO-CH_2 \, -CH_3 \,\,\,\,\,\, H_3 \, C-CO-NH_2 \\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\ I \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, II \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, III !$

A nomenclatura química correta dos compostos orgânicos apresentados é