Which statement describes the three routes of chemical exposure?

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Understanding the ways chemicals can enter the body in a dental setting: inhalation, ingestion, and skin contact. Chemicals can be breathed in as vapors or aerosols (inhalation), swallowed accidentally (ingestion), or absorbed through the skin after a splash or contact (dermal exposure). The other options mix in a route like injection, which isn’t a common everyday entry point for most dental chemicals, and they also include pathways not typically treated as separate in basic safety lists, like broad eye exposure. So the three primary routes are inhalation, ingestion, and skin contact.