This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain Imaging: Anatomy, Trauma, and Tumors, Subject name: Radiology
[{'content': 'A 40-years-old female patient presented with recurrent headaches. MRI showd an extra-aixal, dural based and enhancing lesion. The most likely diagnosis is: \nSelect and explain. \nA. Meningioma, B. Glioma, C. Schwannoma, D. Pituitary adenoma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Meningioma Except glioma all three i.e. Meningioma, Schwannoma and Pituitary adenoma' are extra-axial tumors.Of these only meningioma is the 'dural based' lesion as it arises from the meninges.", 'role': 'assistant'}]