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': 'Not a characteristic feature of meningioma \nSelect and explain. \nA. Calcification, B. Dural tail sign, C. Mother in law sign, D. Intra axial tumor', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Meningioma is extra axial tumor.', 'role': 'assistant'}]