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': 'Bracket calcification on skull X-ray is seen in \nSelect and explain. \nA. Tuberous sclerosis, B. Sturge-Weber Syndrome, C. Corpus callosum lipoma, D. Meningioma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. Corpus callosum lipoma', 'role': 'assistant'}]