This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'A 50 year old male presents with malignant hypeension. the drug of choices \nSelect and explain. \nA. Sodium nitroprusside, B. Sublingual nifedipine, C. Furosemide, D. Enalapril', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is a first choice drug for malignant hypeension Refer kDT 11e p185', 'role': 'assistant'}]