Which of the following are the examples of chemical weapons?

Which of the following are the examples of chemical weapons?

A. Mustard gas

B. Sarin

C. Chlorine

D. All of these

Explanation:

Recently the international chemical weapons watchdog told the U.N. Security Council that its experts have investigated 77 allegations against Syria, and concluded that in 17 cases chemical weapons were likely or definitely used. Chemical weapons are typically categorized as blister, nerve, choking, blood and riot-control agents, and the effects of these weapons are felt immediately upon inhalation or skin contact. Examples of chemical weapons are mustard gas, sarin, chlorine, hydrogen cyanide and tear gas.