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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.
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Postmortem nasal swab in death following -
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The correct answer is  Postmortem nasal swab is taken in poisoning with cocaine because cocaine is usually sniffed for its effects for addiction purposes. Long-term use of cocaine of sniffing causes ulceration and necrosis of the nasal septum.