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': 'Which of the following cause early onset of rigor mois? \nSelect and explain. \nA. Arsenic, B. Pneumonia, C. Hypothermia, D. Strychnine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Strychnine causes early onset of rigor mois, the rest of the options causes delayed rigor mois.', 'role': 'assistant'}]