Question

case file
chemical name: propylene glycol
common uses: this chemical absorbs water. it is used to make polyester compounds. it is used in the production of antifreeze, and as a preservative for food products.
health effects: this chemical may cause nausea, vertigo, strange sensations. this product can be toxic. symptoms of toxicity include seizures and severe neurological symptoms. symptoms are more likely to occur if this chemical is inhaled.
warning
chemical has been detected
to synchronize the lasers and target the correct chemical, answer the following question: which type of exposure is most likely to cause symptoms?
eating something containing the chemical
drinking something containing the chemical
using a lotion that contains the chemical
inhaling something containing the chemical

Explanation:

The health - effects section mentions that symptoms are more likely to occur if the chemical is inhaled.

Answer:

Inhaling something containing the chemical