The correct answer for the ultimate product of Glycolysis is option 3, Pyruvic acid.

Glycolysis is the metabolic pathway that breaks down glucose into two molecules of pyruvic acid. It is the first stage of cellular respiration and occurs in the cytoplasm of cells. During glycolysis, a series of enzymatic reactions, glucose is converted into two molecules of pyruvic acid.

Pyruvic acid is a three-carbon compound. It can be further utilized in two different ways. In the presence of oxygen, pyruvate enters the Krebs cycle and undergoes further oxidation for energy production. In the absence of oxygen, pyruvate can undergo fermentation where it is converted into either lactic acid or ethanol, depending on the organism.

Options 1 and 2, Ethyl alcohol and Carbon dioxide, are not the ultimate products of glycolysis. Ethyl alcohol is only produced if pyruvate undergoes fermentation in yeast cells, while carbon dioxide is produced during later stages of cellular respiration.

Option 4, Glucose, is not the correct answer because glucose is the starting material for glycolysis, not the ultimate product.