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: Pathology
[{'content': 'A 48 year old woman has developed chronic renal failure, and a renal scan showed bilaterally enlarged kidneys with multiple cysts. She had a sudden onset severe headache. A cerebral angiogram demonstrated marked narrowing of cerebral aery branches near the base of the brain, consistent with vasospasm, but no intraparenchymal hemorrhage were present. Which of the following condition MOST likely produced these findings? \nSelect and explain. \nA. Bacterial meningitis, B. Severe atherosclerosis, C. Malignant hypeension, D. Subarachnoid hemorrhage', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The blood irritates the aeries. This effect is often delayed by several days following the initial hemorrhagic event. Berry aneurysms are located in the circle of Willis at the base of the brain, and rupture leads to extravasation of blood into the subarachnoid space. Her renal scan suggests a diagnosis of dominant polycystic kidney disease (DPKD). About 10% of persons with ADPKD develop berry aneurysms.', 'role': 'assistant'}]