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: Pharmacology
[{'content': 'The mechanism of action of chloramphenicol is inhibition of synthesis of: \nSelect and explain. \nA. Cell wall, B. Cell membrane, C. Protein, D. DNA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]