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': 'All are true about postmoem staining except - \nSelect and explain. \nA. Occur immediate after death, B. Common in dependent pa, C. Disappear with rigor mois, D. Margins are raised', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Postmoem staining occurs sholy after death and becomes prominent after four hours. Dr.Narayana Reddys Synopsis of Forensic Medicine and Toxicology 27th edition pg. 76.', 'role': 'assistant'}]