Heat, carbon dioxide, and alcohol can all be produced using the alcohol fermentation process. The production of ethanol is what distinguishes alcoholic fermentation. Thus, option d is correct.
What is alcoholic fermentation?
Alcoholic fermentative happens in yeast where carbon dioxide and carbohydrates like glucose, sucrose, etc. are converted into ethanol (alcohol). When this happens, yeast secretes heat and ethanol as waste products under anaerobic circumstances.
Therefore, ethanol is characteristic of alcoholic fermentation.
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