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': 'H2S inhibits which complex of ETC - \nSelect and explain. \nA. I, B. II, C. III, D. IV', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., IV Inhibitors of Electron transport chain (Respiratory chain)o Complex I :- Barbiturates (amobarbital), piercidin A, rotenone, chlorpromazine, guanithidine.o Complex II:- Carboxin, TTFA, malonate.o Complex III :- Dimercaproi. BAL, actinomycin A, Naphthyloquinone.o Complex IV :- (cytochrome c oxidase) Carbon monoxide (CO), cyanide (CN-). HJS, azide (N3-)", 'role': 'assistant'}]