<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 44-year-old man comes to the emergency department because of a severe headache and blurry vision for the past 3 hours. He has hypertension treated with hydrochlorothiazide. He has missed taking his medication for the past week as he was traveling. He is only oriented to time and person. His temperature is 37.1C 98.8F, pulse is 92min and regular, and blood pressure is 245115 mm Hg. Cardiopulmonary examination shows no abnormalities. Fundoscopy shows bilateral retinal hemorrhages and exudates. Neurologic examination shows no focal findings. A complete blood count and serum concentrations of electrolytes, glucose, and creatinine are within the reference range. A CT scan of the brain shows no abnormalities. Which of the following is the most appropriate pharmacotherapy?? A: Intravenous nitroprusside, B: Oral captopril, C: Intravenous mannitol, D: Oral clonidine, E: Sublingual nifedipine,  <response>: This is a clinical vignette describing a patient with severe headache, blurry vision, and very high blood pressure. Based on the information provided, this is most likely a hypertensive emergency due to the patients untreated hypertension. The goal of treatment is to lower blood pressure quickly but safely to prevent end organ damage. Choice A, intravenous nitroprusside, is a direct vasodilator that can rapidly lower blood pressure and is commonly used in hypertensive emergencies. Choice B, oral captopril, is an ACE inhibitor that lowers blood pressure but not rapidly enough for a hypertensive emergency. Choice C, intravenous mannitol, is an osmotic diuretic sometimes used to lower intracranial pressure but does not treat the underlying cause of elevated BP.Choice D, oral clonidine, is an antihypertensive but does not act quickly enough for a hypertensive emergency.Choice E, sublingual nifedipine, can lower BP rapidly but is no longer recommended for hypertensive emergencies due to risk of adverse events.A: Intravenous nitroprusside 