Your vessel is carrying a cargo of Propionitrile, which has caught fire. Which extinguishing agents should be used?

Correct Answer: Option B — Alcohol foam, carbon dioxide or dry chemical.

Propionitrile is a toxic, flammable liquid requiring specialized firefighting tactics. Alcohol-resistant foam is mandatory because standard foams will be destroyed by the chemical's polar nature. Carbon dioxide and dry chemical agents are effective for extinguishing the flames while minimizing the risk of spreading the toxic liquid.