Match the components of the electron transport chain with their primary functions in the process:

	Column A: Components		Column B: Functions
1	NADH dehydrogenase (Complex I)	A	Transfers electrons from Complex III to Complex IV
2	Ubiquinone	B	Receives electrons from both NADH and FADH2 and transfers them to Complex III
3	Cytochrome bc1 complex (Complex III)	C	First component to receive electrons from NADH and pass them to ubiquinone
4	Cytochrome c oxidase complex (Complex IV)	D	Final electron acceptor in the chain, transfers electrons to oxygen
5	Cytochrome c	E	Oxidizes ubiquinol and transfers electrons to cytochrome c

	1	2	3	4	5
1	C	B	E	D	A
2	E	A	D	E	B
3	A	D	E	B	C
4	A	C	B	E	D