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: Forensic Medicine
[{'content': 'Maggots in a dead body do not appear before: \nSelect and explain. \nA. 4 hours, B. 12 hours, C. 24 hours, D. 48 hours', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. 48 hours', 'role': 'assistant'}]