The correct option is A Alcohol and CO2.
The respiration process can be aerobic or anaerobic. In both the processes glycolysis, which occurs in absence of oxygen is common. Glycolysis converts one molecule of glucose into two molecules of pyruvic acid. Glycolysis occurs in cell cytoplasm. The anaerobic respiration is a cytosolic process, which results in production of lactic acid (lactic acid fermentation) or ethanol and carbon dioxide (alcoholic fermentation).