On watch, you see smoke coming from a container on deck. Your examiner asks: "Beyond the immediate fire actions (alarm, muster, boundary cooling), how do you use the IMDG Code to inform your response?"

A. The IMDG Code is not consulted during an active fire — fire response follows the general fire plan only, with no reference to cargo documentation.

B. Identify the container's position and cross-reference the cargo/dangerous cargo manifest to establish whether it holds dangerous goods and, if so, the specific UN number and class; use the UN number to find the corresponding EmS (Emergency Schedule, IMDG Code Supplement) for the correct fire-fighting medium/method for that substance, and the MFAG (Medical First Aid Guide) entry in case of casualties or exposure, since some substances require different extinguishing media or present specific toxic/reactive hazards that change the standard fire response.

C. EmS schedules apply only to bulk cargo fires under IMSBC, not to packaged goods fires under IMDG.

D. MFAG is a structural firefighting reference, not a medical one, and is unrelated to dangerous goods incidents.

A. Six classes, mirroring the IMSBC Code's Group A/B/C cargo classification.

B. Eight classes, ending at Class 8 (Corrosives) — there is no Class 9.

C. Nine classes: 1 Explosives, 2 Gases (2.1 flammable, 2.2 non-flammable non-toxic, 2.3 toxic), 3 Flammable liquids, 4 Flammable solids/substances liable to spontaneous combustion/substances dangerous when wet, 5 Oxidising substances and organic peroxides, 6 Toxic and infectious substances, 7 Radioactive material, 8 Corrosives, 9 Miscellaneous dangerous substances and articles.

D. The IMDG Code does not classify goods into numbered classes; classification is done solely by UN number with no class system.

A. Segregation terms describe segregation from crew accommodation only, not between different cargo classes.

B. IMDG segregation has only one category: "stow apart," with no graduated levels of separation.

C. Segregation categories apply only to Class 1 (Explosives); other classes have no segregation requirement between each other.

D. The IMDG Code segregation table uses terms including "Away from," "Separated from," "Separated by a complete compartment or hold from," and "Separated longitudinally by an intervening complete compartment or hold from" — each representing an increasing physical/spatial separation requirement between incompatible classes, applied via the segregation table cross-referencing hazard classes against each other.