This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thanatology, Subject name: Forensic Medicine
[{'content': 'The following rule is not associated with rigor mois \nSelect and explain. \nA. Shapiro, B. Nysten, C. Morrison, D. Rule of 12', 'role': 'user'}, {'content': "Answer: C \nExplanation: Rule of Morrison: Gestational age of fetus (6 - 10 months) Nysten's rule: Rigor mois ( order of appearance) Rule of 12: Rigor mois Shapiro's rule: Rigor mois Rule of 9: Burns Rule of Hasse: Gestational age of fetus (first 5 months) Casper's dictum: Decomposition", 'role': 'assistant'}]