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: Gynaecology & Obstetrics
[{'content': 'All of the following may be used in pregnancy associated hypertension except: \nSelect and explain. \nA. Nifedipine, B. Captopril, C. Methyldopa, D. Hydralazine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Common antihypertensives used in PIH', 'role': 'assistant'}]