This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Which of the following is true regarding classical spontaneous bacterial peritonitis? 
Select and explain. 
A. Ascitic fluid neutrophil count is > 250/cumm, B. Bowel perforation should be present, C. Multiple organisms are isolated from ascetic fluid, D. Board like rigidity is present in abdomen
A: Ascitic fluid neutrophil count is > 250/cumm
Answer: A: Ascitic fluid neutrophil count is > 250/cumm 
Explanation: Features of Spontaneous bacterial peritonitis are:Spontaneous infection of ascitic fluid without an intra-abdominal sourceIf more than 2 organisms are identified, secondary bacterial peritonitis due to a perforated viscus should be consideredFluid sample has an absolute neutrophil count > 250/cummPatients present with fever, altered mental status, elevated white blood cell count, and abdominal pain or discomfo, or they may present without any of these features(Ref: Harrison's 18/e p1979)