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
[{'content': 'Final acceptor of electrons in ETC is: \nSelect and explain. \nA. Cyt c, B. Oxygen, C. FADH2, D. CoQ', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]