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
All of the following signs are not seen in acute appendicitis except - 
Select and explain. 
A. Rovsing' s, B. Murphy's sign, C. Boa's sign, D. Mack wen's sign
A: Rovsing' s
Answer: A: Rovsing' s 
Explanation: None