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 male patient presents with headache, profuse sweating and palpitations with a blood pressure of 180/120 mm Hg. The drug of choice would be \nSelect and explain. \nA. Nifedipine, B. Labetalol, C. Prazocin, D. Phenoxy benzamine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Labetalol) Symptomatic Hypeension with diastolic pressure of 120 suggest a diagnosis of Hypeensive Emergency. Labetalol (intravenous) is the drug of choice for management of Hypeensive Emergencies (amongst the options provided).', 'role': 'assistant'}]