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': 'On autopsy, fine froth was found in the resp. tract, nose and mouth. Likely cause of death - \nSelect and explain. \nA. Drowning, B. Hanging, C. Strangulation, D. Tooth paste poisoning', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]