Alcohol is a product of

Answer: Option A

Alcohol is a product of anaerobic respiration.
Anaerobic respiration is respiration using electron acceptors other than molecular oxygen (O₂). Although oxygen is not the final electron acceptor, the process still uses a respiratory electron transport chain.
The end product of anaerobic respiration in plants is ethanol. At the same time, the end product of anaerobic respiration in animals is lactic acid.