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': 'Phenobarbitone inhibits which complex of ETC? \nSelect and explain. \nA. Complex I, B. Complex II, C. Complex III, D. Complex IV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Complex I(Ref: Harper 31/e page 123)Inhibitors of ETC at Complex I1. An insecticide and a fish Poison Rotenone2. Amobarbital which is a barbiturate.3. Piericidin', 'role': 'assistant'}]