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: Radiology
[{'content': 'Tram track calcification is feature of \nSelect and explain. \nA. Sturge Weber syndrome, B. CMV, C. Paragonimus cyst, D. Corpus callosal lipoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tram track\xa0calcification - Sturge weber.\nPeriventricular\xa0 - CMV.', 'role': 'assistant'}]