This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries, Subject name: Forensic Medicine
[{'content': 'Presence of diatoms in bone marrow are characteristic of which of the following? \nSelect and explain. \nA. Putrefaction, B. Drowning, C. Strangulation, D. Throttling', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) DrowningRef.: The Essentials ofFSM by K.S. Narayan Reddy 31st ed. / 346', 'role': 'assistant'}]