In glycolysis, glucose is split into two pyruvate molecules and 2 ATP
molecules are generate per molecule of glucose as well as 2 molecules of
NADH
Krebs Cycle uses the pyruvate molecules from glycolysis to generate 2
ATP as well as several molecules of FADH2 and NADH for the electron
transport chain
So neither of those 2 is correct.
Electron transport chain uses the NADH and FADH2 molecules formed during
glycolysis and krebs cycle
