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 seen in \nSelect and explain. \nA. Eosinophilic granuloma, B. Sturge weber syndrome, C. Weber Christain syndrome, D. Neurofibroma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sturge weber syndrome', 'role': 'assistant'}]