Which hazard can be fatal if swallowed or if it enters the airways?

• A. Acute Toxicants
• B. Eye Hazards
• C. Aspiration Hazards
• D. Mutagens

Answer: (C)

This question tests how exposure routes shape the danger. An aspiration hazard refers to a substance that can cause serious lung injury if it enters the airways, such as when something is swallowed and then accidentally breathed into the lungs or when vomiting leads to inhalation. The lungs are highly sensitive, and introducing toxic liquids or fumes there can cause chemical pneumonitis, swelling, and potentially fatal respiratory failure.

Other hazards describe different risks: eye hazards affect the eyes; mutagens are about genetic damage rather than immediate airway injury; acute toxicants cover substances that cause harm from exposure but don’t specify the airway route as the critical risk. So the hazard that is specifically fatal if swallowed or enters the airways is the aspiration hazard.