This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Nerve gases include all, except 
Select and explain. 
A. Tabun, B. Bromo Benzyl Cyanide (BBC), C. Sarin, D. Soman
B: Bromo Benzyl Cyanide (BBC)
Answer: B: Bromo Benzyl Cyanide (BBC) 
Explanation: Tabun, Sarin, Soman, Cyclosarin are some examples of the nerve agents. Bromo Benzyl Cyanide is a tear gas. Ref - Krishnan Vij 5th edition pg 554-556