According to U.S. regulations, normally, where are manholes in LFG located?

Correct Answer: Option B — above the weather deck

Under 46 CFR requirements for tank vessels, manholes for LFG (Liquefied Flammable Gas) tanks must be located above the weather deck. This placement is a critical safety measure to prevent the accumulation of hazardous vapors in enclosed spaces and to ensure rapid access for emergency venting or inspection.