How it option one correct??

Dear student,Fermentation recycles NAD+ from NADH.As pyruvate is reduced, NADH is oxidized to NAD+. In fermentation, the final electron acceptor is pyruvate (lactic acid fermentation), acetaldehyde (alcohol fermentation), or some other organic molecule. In cellular respiration, the final electron acceptor is oxygen.NADH formed during conversion of triose-3-phosphate to 3-phosphoglycerate is oxidised to NAD+,so it is electron donor.Thus option i is correct.Regards.