<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 67-year old woman is brought to the emergency department after she lost consciousness while at home. Her daughter was with her at the time and recalls that her mother was complaining of a diffuse headache and nausea about 2 hours before the incident. The daughter says that her mother has not had any recent falls and was found sitting in a chair when she lost consciousness. She has hypertension. Current medications include amlodipine, a daily multivitamin, and acetaminophen. She has smoked 12 pack of cigarettes daily for the past 45 years. Her pulse is 92min, respirations are 10min, and blood pressure is 158100 mm Hg. She is disoriented and unable to follow commands. Examination shows nuchal rigidity. She has flexor posturing to painful stimuli. Fundoscopic examination is notable for bilateral vitreous hemorrhages. Laboratory studies are within normal limits. An emergent non-contrast CT scan of the head is obtained and shows a diffuse hemorrhage at the base of the brain that is largest over the left hemisphere. Which of the following is the most likely cause of this patients symptoms?? A: Ruptured mycotic aneurysm, B: Ruptured saccular aneurysm, C: Intracranial arteriovenous malformation, D: Intracranial arterial dissection, E: Spinal arteriovenous malformation,  <response>: This is a clinical vignette describing a 67-year-old woman with sudden loss of consciousness, headache, nausea, hypertension, and a long history of smoking. She is disoriented on exam with signs of meningeal irritation and bilateral vitreous hemorrhages. A head CT shows diffuse subarachnoid hemorrhage, largest on the left. The key findings are an acute severe headache followed by loss of consciousness in a patient with long-standing hypertension. This presentation is most consistent with a ruptured cerebral aneurysm leading to subarachnoid hemorrhage. The diffuse and basal pattern of hemorrhage makes a ruptured mycotic aneurysm unlikely. There is no evidence for an AVM or arterial dissection. A spinal AVM would not cause vitreous hemorrhage or findings on head CT.B: Ruptured saccular aneurysm 