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': 'Immediate sign of death is: DNB 10 \nSelect and explain. \nA. Fall in body temperature, B. Dilatation of pupil, C. Changes in skin, D. Cessation of respiration and circulation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Cessation of respiration and circulation', 'role': 'assistant'}]