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
Postmortem lividity is unlikely to develop in a case of - 
Select and explain. 
A. Drowning in well, B. Drowning in a fast flowing river, C. Postmortem submersion, D. Drowning in chlorinated swimming pool
B: Drowning in a fast flowing river
Answer: B: Drowning in a fast flowing river 
Explanation: 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).