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: Medicine
[{'content': 'The histologic criteria for diagnosis of acute appendicitis is neutrophilic infiltration of - \nSelect and explain. \nA. Mucosa, B. Submucosa, C. Muscularis propria, D. Serosa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]