Choose correct statements for fermentation:

(i) Fermentation takes place under aerobic conditions in many prokaryotes and unicellular eukaryotes.

(ii) In fermentation, say by yeast, the incomplete oxidation of glucose is achieved

(iii) In fermentation pyruvic acid is converted to CO 2 and ethanol.

(iv) The enzymes pyruvic acid decarboxylase and alcohol dehydrogenase catalyze these reactions.

(v) Other organisms like some bacteria converts lactic acid to pyruvic acid and CO 2 .

(vi) In animal cell also, like muscles during exercise, when oxygen is inadequate pyruvic acid is reduced to lactic by lactate dehydrogenase.