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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Fat mesentery is sent for investigation in which poisoning -
assistant
The correct answer is  Fat mesentery is preserved in OP poisoning. Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 61.