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': 'In ETC cmplex-4 is inhibited by all except ? \nSelect and explain. \nA. CO, B. CN, C. H2S, D. BAL', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e.,BAL Complex I :- Barbiturates (amobarbital), piercidin A, rotenone, chlorpromazine, guanithidine.", 'role': 'assistant'}]