Cho sơ đồ sau: ...

Câu hỏi: Cho sơ đồ sau: ${\mathrm{CO}}_2 \stackrel{\left(1\right)}{\to } {\left({\mathrm{C}}_6{\mathrm{H}}_{10}{\mathrm{O}}_5\right)}_{\mathrm{n}} \stackrel{\left(2\right)}{\to } {\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11} \stackrel{\left(3\right)}{\to } {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6 \stackrel{\left(4\right)}{\to } {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$

A. (2), (3), (4)

B. (2),(3)

C. (2), (4)

D. (1), (2), (4)