This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pathology
[{'content': 'Foix-Alajouanine disease of the spinal cord is a: \nSelect and explain. \nA. Arteriovenous malformation, B. Cavernous malformation, C. Capillary telangiectasia, D. Venous angioma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) Arteriovenous malformation(Ref: Toole's Cerebrovascular Disorders pg 351)Foix-Alajouanine syndrome is an arteriovenous (AV) malformation of the spinal cord predominantly affecting the lower thoracic and/or lumbosacral levels Foix-Alajouanine syndrome usually occurs in older patients (>50 y).", 'role': 'assistant'}]