You are on a multiple-product chemical tanker and will carry cargoes of butyric acid, propylene oxide, and octyl alcohol. Which statement is true?

Correct Answer: Option C — Propylene oxide may not be stowed in a tank adjacent to butyric acid.

Propylene oxide is an extremely reactive epoxide requiring stringent segregation. Per 46 CFR Part 153 compatibility guidelines, it cannot be stowed adjacent to organic acids like butyric acid due to the severe exothermic polymerization risks.