Which Pathway Shows the Correct Path of Electron Transfer from a Molecule

Which pathway shows the correct path of electron transfer from a molecule of FADH2?

A) succinate reductase ? ubiquinone ? cytochrome oxidase ? cytochrome b-c1 ? cytochrome c ? O2
B) succinate reductase ? ubiquinone ? cytochrome b-c1? cytochrome c ? cytochrome oxidase ? O2
C) ubiquinone ? cytochrome b-c1? cytochrome c ? cytochrome oxidase ? NADH hydrogenase ? O2
D) succinate reductase ? ubiquinone ? cytochrome b-c1? cytochrome c ? cytochrome oxidase ? O2.
E) ubiquinone ? cytochrome b-c1? cytochrome c ? NADH hydrogenase ? cytochrome oxidase ? O2.