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
Which of the following is known as abdominal policeman? 
Select and explain. 
A. Omentum, B. Spleen, C. Liver, D. None of the above
A: Omentum
Answer: A: Omentum 
Explanation: In the early twentieth century, the British surgeon Rutherford Morison noted that the omentum tended to wall off areas of infection and limit the spread of intraperitoneal contamination. He termed the omentum the abdominal policeman. Ref: Schwaz's principle of surgery 9th edition, chapter 35.