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': 'Drug not useful in hypeensive emergency is: \nSelect and explain. \nA. Hydralazine, B. Indapamide, C. Sublingual nifedipine, D. Clevidipine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Indapamide is a thiazide diuretic agent, used in uncomplicated hypeension. In a hypeensive emergency, BP should be reduced by not more than 25% within minutes to hours and the to 160/100mm Hg within 2-6 hours. Clevidipine, hydralazine, sod. nitroprusside, GTN, SL nifedipine, Esmolol etc are used (REF. Essentials of medical pharmacology K D TRIPATHI 8th Edition)', 'role': 'assistant'}]