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
Blistering war gas is: Maharashtra 09 
Select and explain. 
A. Chlorine gas, B. Mustard gas, C. HCN gas, D. Tabun
B: Mustard gas
Answer: B: Mustard gas 
Explanation: Ans. Mustard gas