Correct Option: D

The slow decomposition of organic matter into simpler substances in presence of enzymes is known as fermentation. Fermentation is used for the preparation of alcoholic beverages from grape juice and other fruit juices in presence of yeast, which contains proper enzymes. In the first process, sugar from molasses or sugarcane, fruits or starch is first converted to glucose and fructose (isonomers) in presence of an enzyme called invertase. C₁₂H₂₂O₁₁+ H₂O → C₆H₁₂O₆+ C₆H₁₂O₆. Glucose and fructose are both converted to ethanol and carbon dioxide in presence of another enzyme, zymase. Both the enzymes, invertase and zymase, are present in yeast. C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂