This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Radiology
[{'content': 'Intracranial calcification in skull X- ray may be: \nSelect and explain. \nA. Pineal calcification, B. Duralcalfication, C. Cysticercosis, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: d) all of these ref: Chapman 4th/e p.428-429', 'role': 'assistant'}]