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': 'Which of the following completely blocks oxidation and phosphorylation by blocking the flow of protons through ATP synthase? \nSelect and explain. \nA. Oligomycin, B. Cyanide, C. BAL, D. Carboxin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The antibiotic oligomycin completely blocks oxidation and phosphorylation by blocking the flow of protons through ATP synthase. Reference: Harper; 30th edition; Page no: 132', 'role': 'assistant'}]