Which entry on a dangerous cargo manifest concerning the classification of a cargo is NOT correct?

Correct Answer: Option B — Division 3.1

Under 49 CFR 172.101 and 173, Hazard Class 3 (Flammable Liquids) does not have numerical divisions such as "3.1". It is simply designated as Class 3. Conversely, Class 8 (Corrosives) and Division 2.3 (Poisonous Gas) are valid Hazardous Materials classifications used on shipping papers and dangerous cargo manifests.