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
Death caused in suicide by household things in Japan is due to the production of: AI 12 
Select and explain. 
A. Acidic solution, B. H2S, C. HCN gas, D. CO
B: H2S
Answer: B: H2S 
Explanation: Ans. H2S