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': 'What is the colour of postmortem lividity in case of cyanide poisoning? \nSelect and explain. \nA. Pink, B. Chocolate brown, C. Bluish green, D. Brick red', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cyanide poisoning - Brick red\nCarbon monoxide poisoning - cherry red', 'role': 'assistant'}]