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': 'Most common cause of intracranial calcification is: \nSelect and explain. \nA. Pineal calcification, B. Intracranial aneurysm, C. Meningioma, D. Tuberculoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Pineal calcification', 'role': 'assistant'}]