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': 'Drug that must be sold by retail only when a prescription by RMP is produced is scheduled under: \nSelect and explain. \nA. H, B. mM, C. P, D. W', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]