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: Medicine
[{'content': 'A 56-year-old African-American man with COPD comes to the physician for a routine examination. His average diurnal ambulatory blood pressure is 148/92 mmHg. Laboratory studies show creatinine level of 3.2 mg/dL and a potassium level of 5.6 mg/dL. \nWhich of the following medications would most likely be considered the first-line treatment in this patient? \nSelect and explain. \nA. Amlodipine, B. Doxazosin, C. Propranolol, D. Pamipril', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]