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
[{'content': 'Diffuse peritonitis following appendicitis is usually seen - \nSelect and explain. \nA. When appendicular perforation occurs early (within 24 hours), B. When perforation occurs late (after 24 hours), C. Particularly in non-obstructive appendicitis, D. When antibiotics are withheld', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In late stages greater omentum and small bowel become adherent to inflamed appendix, walling off the spread of peritoneal contamination', 'role': 'assistant'}]