This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and postmortem changes, Subject name: Forensic Medicine
[{'content': 'Rigor mois stas in - \nSelect and explain. \nA. Right Iliac, B. Left iliac fossa, C. Brain, D. Hea', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Rigor mois stas in myocardium in an hour after death. It is first seen in involuntary muscles then voluntary muscles. Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 79.', 'role': 'assistant'}]