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
Pure word blindness occurs due to lesion in 
Select and explain. 
A. Anterior cerebral aery, B. Posterior cerebral aery, C. Middle cerebral aery, D. Spinal aery
B: Posterior cerebral aery
Answer: B: Posterior cerebral aery 
Explanation: 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)