What agents are classified as chemical warfare agents?

The classification of chemical warfare agents includes substances that are specifically designed to cause harm or death through chemical means. Among the options presented, Mustard Gas, Cyanide, and Phosgene Chlorine are recognized as notorious agents used in chemical warfare throughout history.

Mustard Gas is a blistering agent that causes severe skin and respiratory damage. It was widely used during World War I and has a long-lasting effect on the environment, making it particularly heinous as a weapon.

Cyanide is a highly toxic chemical that affects the body's ability to utilize oxygen, leading to rapid incapacitation and death. It can be delivered in various forms, including gas or as a component in certain types of explosives.

Phosgene Chlorine is another deadly chemical warfare agent primarily known for its use during World War I. It is a potent lung irritant that can lead to pulmonary injury and death after exposure.

These agents, therefore, fit the criteria of chemical warfare agents as they are designed to incapacitate or kill in a warfare scenario, highlighting their classification in that context.