A person who is repeatedly exposed to a chemical over a long period of time may develop

• A. Etiological changes.
• B. Acute health hazard.
• C. Chronic health hazard.
• D. Chemical asphyxia.

Answer: (C)

When someone is exposed to a chemical repeatedly over time, the effects tend to develop gradually and may persist even after exposure ends. This is a chronic health hazard—the kind of harm that accumulates or shows up after long-term contact, such as liver or nerve damage from solvents, or cancer risk from certain carcinogens. These problems often have slow onset and may not be obvious from a single exposure.

In contrast, an acute health hazard is the immediate, short-term effect from a single exposure, like irritation or dizziness that occurs right away. Chemical asphyxia describes a specific acute danger where a chemical interferes with oxygen use, typically occurring quickly rather than developing over years. Etiological changes isn’t a standard hazard term used in this context.

So the option describing the long-term, gradual health effects best matches the situation.