The chemical agent Sarin belongs to which category of warfare agents?

• A. Choking
• B. Blood
• C. Nerve
• D. Blister

Answer: (C)

Understanding this question starts with how chemical warfare agents are categorized by their effect on the body. Sarin is a nerve agent—a highly toxic organophosphate that inhibits the enzyme acetylcholinesterase. When this enzyme is blocked, acetylcholine builds up at nerve endings, causing overstimulation of nerves throughout the body. The result is rapid, widespread symptoms such as excessive salivation and sweating, tearing, pinpoint pupils, muscle twitching, weakness, seizures, and possible respiratory failure. This mechanism is distinct from choking agents, which irritate the airways; blood agents, which interfere with cellular respiration; and blister agents, which damage skin and eyes. Because of its effect on nerve signaling and its rapid, systemic impact, Sarin is classified as a nerve agent.