This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Chain, Subject name: Biochemistry
Final acceptor of electrons in ETC is: 
Select and explain. 
A. Cyt c, B. Oxygen, C. FADH2, D. CoQ
B: Oxygen
Answer: B: Oxygen 
Explanation: Ans. B. Oxygen(Ref: Harper 31/e page 123)Electrons are transferred in the ascending order of redox potential, the final oxygen electron acceptor is oxygen.