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
[{'content': "The 'Japanese Detergent Suicide Technique' involves mixing of common household chemical to produce : \nSelect and explain. \nA. H2S and other poisonous gases, B. Deadly foam, C. Deadly acidic compound, D. Deadly fluid cyanide compound", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]