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' in the brain is seen in: \nSelect and explain. \nA. Sturge-Weber syndrome, B. Toxoplasmosis, C. Tuberous sclerosis, D. Syphilis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Sturge-Weber syndrome', 'role': 'assistant'}]