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': 'Postmortem lividity is unlikely to develop in a case of - \nSelect and explain. \nA. Drowning in well, B. Drowning in a fast flowing river, C. Postmortem submersion, D. Drowning in chlorinated swimming pool', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Postmortem lividity does not develop in drowning in running water (due to constantly changing position of body) and areas of contact flattening (due to collapsed capillaries).', 'role': 'assistant'}]