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: Pharmacology
A 6 yr old child presents with malignant hypeension. The Drug of choice is - 
Select and explain. 
A. Na Nitroprusside, B. Sublingual Nifedipine, C. Furoscmide, D. Enalapril
A: Na Nitroprusside
Answer: A: Na Nitroprusside 
Explanation: Ans. is 'a' i.e., Sodium Nitroprusside "The drug most commonly used to treat hypeensive emergencies is the vasodilator sodium nitroprusside" "Because of predictable, instantaneous, titratable and balanced aerio-venous vasodilator)/ action which persists without tolerance till infused, nitroprusside is the drug of choice for most hypeensive emergencies". DOC for hypeensive emergencies is calcium channel blockers (nicardipine or clevidipine). Nitroprusside is no longer preferred now.