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': 'Pure word blindness occurs due to lesion in \nSelect and explain. \nA. Anterior cerebral aery, B. Posterior cerebral aery, C. Middle cerebral aery, D. Spinal aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Posterior cerebral aeryPure alexia almost always involves an infarct to the left posterior cerebral aery which perfuses the splenium of the corpus callosum and left visual coex, among other things)', 'role': 'assistant'}]