Which of the following is NOT one of the four types of chemical agents?

Chemical agents are classified into specific categories based on their effects and mode of action. The four primary types of chemical agents recognized in military contexts include nerve agents, choking agents, blister agents, and incapacitating agents.

Nerve agents disrupt the normal functioning of the spinal cord and nerves, leading to respiratory failure and potentially death. Choking agents affect the respiratory system, causing suffocation and pulmonary damage. Blister agents, on the other hand, damage skin and internal organs, causing painful blisters and other serious injuries.

Radiation, however, does not fall under the category of chemical agents. Instead, it is associated with nuclear or radiological weapons and refers to the emission of energy as electromagnetic waves or particles. This distinction is essential in understanding the different types of threats faced in combat situations and the specific protections required against them. Thus, identifying radiation as not being a chemical agent highlights the need to accurately categorize different types of weapons and their effects.