Which of the Following Reactions Describes How Some Species of Archaea

Multiple Choice

Which of the following reactions describes how some species of archaea produce carbon dioxide under anaerobic conditions?

A) 3 CH₃OH $\rightarrow$ CO₂ + 6 H₂O + 3 CH₄
B) 4 CH₃OH $\rightarrow$ CO₂ + 2 H₂O + 3 CH₄
C) CO₂ + H₂O + 3 CH₄ $\rightarrow$ 2 CH₃OH
D) 3 CH₃OH + O₂ $\rightarrow$ CO₂ + H₂O₂ + 2 CH₄