Which set correctly lists three common exposure routes with examples?

• A. Oral ingestion (contaminant in water); Intravenous injection.
• B. Inhalation of solvent vapors; Dermal contact with solvents; Intramuscular injection.
• C. Dermal contact with solvents; Inhalation of solvent vapors; Intravenous injection.
• D. Oral ingestion (contaminant in water); Dermal contact with solvents; Inhalation of solvent vapors.

Answer: (D)

The main concept is that there are three common routes by which people are exposed to chemicals: ingestion, inhalation, and dermal contact. The correct set matches each route with a concrete example: oral ingestion (contaminant in water) for ingestion, inhalation of solvent vapors for inhalation, and dermal contact with solvents for dermal exposure. The other options introduce routes like intravenous or intramuscular injections, which aren’t typical environmental exposure pathways, and some omit one of the common routes. So this set is the best because it covers all three standard exposure routes with appropriate examples.