Pyruvic acid, the key product of glycolysis have many metabolic fates. Under aerobic conditions it forms

Question

$\begin{array}{1 1}a.Lactic\; acid \\ b. CO2\; and\; H_2O \\ c.Acetyl\; CoA\; and\; CO_2 \\ d.Ethanol \; and\; CO_2 \end{array}$