In the citric acid cycle, for each pyruvate that enters the cycle, one ATP, three NADH, and one FADH2 are produced. For each glucose molecule that enters glycolysis, how many ATP, NADH, and FADH2 are produced in the citric acid cycle?
a. two ATP, six NADH, two FADH2
b. one ATP, three NADH, one FADH2
c. three ATP, three NADH, one FADH2
d. about 38 ATP
e. four ATP, six NADH, two FADH2