The correct option is C Ten -8 NADH + 2 FADH2
1 molecule of glucose yields 2 NADH (reduced nicotinamide adenine dinucleotide), 2 ATP and 2 pyruvate while undergoing glycolysis (breakdown of glucose). The 2 molecules of pyruvate are completely degraded in Krebs cycle to form 2 ATP, 8 NADH (reduced nicotinamide adenine dinucleotide) and 2 FADH2.