Fermentation of sugar leads to

Correct answer: (a) Ethyl alcohol

Explanation

In fermentation, enzymes from yeast turn sugar into ethyl alcohol (ethanol) and carbon dioxide:

• invertase splits sucrose into glucose and fructose
• zymase turns them into ethanol: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

This is how beer, wine and industrial alcohol are made.