Question

multiple choice question
in anaerobic fermentation pyruvate is reduced to what?

hydrochloric acid

acetic acid

lactate

carbonic acid

Explanation:

In anaerobic fermentation (like lactic acid fermentation), pyruvate is reduced to lactate (lactic acid) by the enzyme lactate dehydrogenase, using NADH as the reducing agent. Hydrochloric acid is gastric acid, acetic acid is from acetic acid fermentation (different pathway), and carbonic acid is related to $CO_2$ and water, not pyruvate reduction in typical anaerobic fermentation for muscle or microbial lactic acid fermentation.

Answer:

C. Lactate