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Fermentation is anaerobic production of

1. protein and acetic acid
2. alcohol, lactic acid or similar compounds
3. ethers and acetones
4. alcohol and lipoproteins

Correct answer: alcohol, lactic acid or similar compounds

Solution

Fermentation is an anaerobic process in which microorganisms convert sugars into products like alcohol or lactic acid. These are the classic end products of fermentation, so the correct choice is the one listing them.

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