This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
[{'content': "'Tram-track' calcification on skull radiograph is characteristic of \nSelect and explain. \nA. Congenital CMV infection, B. Congenital toxoplasmosis, C. Sturge Weber syndrome, D. Craniopharyngioma", 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]