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': 'Marbling is noticed by: \nSelect and explain. \nA. 18 hours, B. 36 hours, C. 48 hours, D. 24 hours', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 36 hours', 'role': 'assistant'}]