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: Surgery
Feature of posterior cranial fossa is: 
Select and explain. 
A. Battle's sign., B. Guerin sign., C. Corman's sign., D. Verill's sign.
A: Battle's sign.
Answer: A: Battle's sign. 
Explanation: None