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': 'The inhibitor of complex IV of electron transpo chain is \nSelect and explain. \nA. Barbiturates, B. Animycin A, C. Hydrogen sulfide, D. Dimecaprol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Complex IV inhibitors i. Carbon monoxide inhibits cellular respiration ii. Cyanide (CN-) iii. Azide (N3-) iv. Hydrogen sulphide (H2S)Ref: MN Chatterjea Textbook of Medical Biochemistry, 6th edition, page no: 234', 'role': 'assistant'}]