What are 3 of the 4 fates of pyruvate metabolism?

The three main fates of pyruvate metabolism are: 1) Conversion to Acetyl-CoA: In aerobic conditions, pyruvate is converted into acetyl-CoA, which enters the citric acid cycle for further ATP production. 2) Lactic Acid Fermentation: Under anaerobic conditions in muscle cells or certain bacteria, pyruvate is converted into lactate to regenerate NAD+, which is required for glycolysis. 3) Alcoholic Fermentation: In yeast and some other microorganisms, pyruvate is converted into ethanol and carbon dioxide, also regenerating NAD+ for glycolysis. These three processes are the major metabolic pathways pyruvate can take, depending on oxygen availability.