This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Which of the following vitamins is a major electron acceptor in electron transport chain \nSelect and explain. \nA. Vitamin B1, B. Vitamin B2, C. Vitamin B3, D. Vitamin B6', 'role': 'user'}, {'content': 'Answer: C \nExplanation: NAD+ is the major electron acceptor in electron transport chain. NAD+ is derivative of the vitamin B3 (niacin).', 'role': 'assistant'}]