During the Krebs cycle, complete aerobic oxidation of glucose (C₆H₁₂O₆) produces each of the following, except one. Which is the exception?
a) Carbon dioxide (CO₂)
b) ATP (Adenosine Triphosphate)
c) NADH (Nicotinamide Adenine Dinucleotide)
d) Glucose (C₆H₁₂O₆)