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': 'Calcium blocking agents of use in the treatment of hypertension include - \nSelect and explain. \nA. Prazosin, B. Lidoflazine, C. Captopril, D. Nifedipine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]