Electron Flow in the Mitochondria Follows This Pathway

Multiple Choice

Electron flow in the mitochondria follows this pathway:

A) Complex I → complex II → complex III → complex IV.
B) Complex IV → complex III → complex II → complex I.
C) Complex I → complex III → complex IV.
D) Complex II → complex III → complex IV.
E) Both complex I → III → IV and complex II → III → IV.