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': 'Casper Dictum is: \nSelect and explain. \nA. Identification of dead body, B. Calculation of time since death, C. Detection of child abuse, D. Detection of Co poisoning', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Calculation of time since death', 'role': 'assistant'}]