This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pregnancy induced Hypeension, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is appropriate first-line medical therapy for hypeension with pheochromocytoma in pregnancy? \nSelect and explain. \nA. Calcium-channel blockers, B. b -Blockers, C. a-Blockers, D. Apresoline', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Immediate control of hypeension and pheochromocytoma symptoms with an alpha blocker such as phenoxybenzamine is imperative. The dose is 10 to 30 mg, two to four times daily. After alpha-blockade is achieved, beta -blockers may be given for tachycardia if necessary.', 'role': 'assistant'}]