The correct answer is (c) (i) and (iv).
Explanation:
(i) is correct:
Yeast can convert pyruvate into ethanol and carbon dioxide through a process called alcoholic fermentation.
(iv) is correct:
Fermentation is a type of anaerobic respiration, meaning it occurs in the absence of oxygen.
(ii) is incorrect:
Fermentation is an anaerobic process, and aerobic bacteria require oxygen for respiration.
(iii) is incorrect:
Fermentation happens in the cytoplasm, not the mitochondria. Mitochondria are the site of aerobic respiration.