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': 'Which of the following the characteristic feature of subdural hematoma - \nSelect and explain. \nA. Convex hyper density, B. Biconvex hypo density, C. Convexo-concave hypo density, D. Concavo-convex hyper density', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e. Concavo-convex hyperdensity .On CT Scan Subdural hematoma - Concavo convex* hyperdensity Epidural hematoma - Biconvex hyperdensity *", 'role': 'assistant'}]