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
Lungs are preserved in - 
Select and explain. 
A. Alcohol poisoning, B. HCN poisoning, C. Carbon monoxide poisoning, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Lung is preserved in gaseous poison (e.g. CO), alcohol, chloroform and cyanide (HCN) poisoning.