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: Medicine
[{'content': 'Memory impairment occurs in embolism of posterior cerebral artery because of damage to - \nSelect and explain. \nA. Hipppocampal gyrus, B. Superior temporal gyrus, C. Prefrontal gyrus, D. Angular gyrus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]