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
Positive Kehrs sign is - 
Select and explain. 
A. Haemopeionium, B. Acute cholecystitis, C. Acute pancreatitis, D. Amoebic abscess
A: Haemopeionium
Answer: A: Haemopeionium 
Explanation: Ans. is 'a' i.e., Haemoperitoneum