This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infant deaths & child abuse, Subject name: Forensic Medicine
[{'content': 'The umblical cord of the baby shows mummification changes. The time since bih is ____ \nSelect and explain. \nA. 2 days, B. 3 days, C. 4 days, D. 7 days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Time since bih by umbilical cord changes Drying up of cut margin: 2 hr Drying up of cord: 1 day Inflammatory line at the base of stump: 2 days Obliteration and mummification changes: 3 days Detach (falls off ): 5-6 days Complete healing (scar): 10-12 days', 'role': 'assistant'}]