Considere as seguintes substâncias:

• I. $$\begin{array}{c}\mathrm{H}{}_3\mathrm{C}\end{array}-\begin{array}{c}\mathrm{H}{}_2\mathrm{C}\end{array}-\begin{array}{c}\\ \\ \mathrm{C}\\ \Vert \\ \mathrm{O}\end{array}-\begin{array}{c}\mathrm{H}\end{array}$$

• II. $$\begin{array}{c}\mathrm{H}{}_3\mathrm{C}\end{array}-\begin{array}{c}\mathrm{H}{}_2\mathrm{C}\end{array}-\begin{array}{c}\\ \\ \mathrm{C}\\ \Vert \\ \mathrm{O}\end{array}-\begin{array}{c}\mathrm{CH}{}_3\end{array}$$

• III. $$\begin{array}{c}\mathrm{H}{}_3\mathrm{C}\end{array}-\begin{array}{c}\mathrm{H}{}_2\mathrm{C}\end{array}-\begin{array}{c}\mathrm{O}\end{array}-\begin{array}{c}\mathrm{CH}{}_3\end{array}$$

• IV. $$\begin{array}{c}\mathrm{H}{}_3\mathrm{C}\end{array}-\begin{array}{c}\mathrm{H}{}_2\mathrm{C}\end{array}-\begin{array}{c}\\ \\ \mathrm{C}\\ \Vert \\ \mathrm{O}\end{array}-\begin{array}{c}\mathrm{O}\end{array}-\begin{array}{c}\mathrm{CH}{}_3\end{array}$$

e as seguintes funções químicas:

• a) Ácido carboxílico;

• b) Álcool;

• c) Aldeído;

• d) Cetona;

• e) Éster ;

• f) Éter.

A opção que associa corretamente as substâncias com as funções químicas é: