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Match phase 4 state: 1. P-IV: p. Methane 2. Gas: q. CH4 & CO2 3. Acid: r. Decreases

A1-p, 2-q, 3-r
B1-p, 2-r, 3-q
C1-q, 2-p, 3-r
D1-r, 2-p, 3-q
Answer & Solution
Correct answer: A. 1-p, 2-q, 3-r
In Phase IV methane fermentation, methanogens convert organic acids into methane (CH4) and carbon dioxide (CO2).
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