Which scenario illustrates an acute toxicity event?

• A. Cyanide poisoning after a single ingestion
• B. Lead accumulating over years
• C. Benzene exposure chronic dermal
• D. Asbestos in air over decades

Answer: (A)

Acute toxicity involves rapid onset of harmful effects after a single exposure or a brief, high-dose exposure. The scenario of a single ingestion leading to cyanide poisoning fits this pattern because cyanide acts quickly to disrupt cellular respiration, causing sudden symptoms such as headache, confusion, seizures, or collapse, often within minutes to hours and can be fatal.

The other scenarios describe effects that develop over long periods with repeated or ongoing exposure. Lead accumulates in the body over years and causes chronic toxicity; benzene exposure here implies ongoing contact that leads to chronic effects; asbestos in the air over decades leads to long-latency diseases like asbestosis or mesothelioma. These illustrate chronic, not acute, toxicity.