A spontaneous reaction is one in which energy is released. the correct option is (A).
Free energy is released during spontaneous reactions, which renders the result thermodynamically stable. Entropy is rising while energy is decreasing. Although endothermic reactions can occur, exothermic reactions are more common.
An oxidation process called catabolism releases energy.
Since an oxidizing agent obtains electrons, glycolysis can produce energy without oxygen. Lactate and acetyl coA are produced from pyruvate.
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