Postmortem nasal swab in death following -: (A) Cocaine poisoning, (B) Hanging, (C) Drowning, (D) Strychnine poisoning
Answer is A. 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.