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': 'FADH2 enters ETC via which complex? \nSelect and explain. \nA. Complex I, B. Complex II, C. Complex III, D. Complex IV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: FADH2\xa0enters ETC via Complex II (Succinate Q Reductase) and hence generates only 1.5 molecules of ATP. (NADH generates 2.5 ATPs)', 'role': 'assistant'}]