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: B i.e. Concave Convex hyperdense