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
Characteristic of subdural hematoma is – 
Select and explain. 
A. Convex hyperdensity, B. Concavo convex hyperdense, C. Biconvex hyperdense, D. Concavo convex hypodense
B: Concavo convex hyperdense
Answer: B: Concavo convex hyperdense 
Explanation: None