Compared to air, the weight of liquefied petroleum gas vapors are which of the following?

Correct Answer: Option B — heavier

Liquefied petroleum gas (LPG) vapors are significantly denser than air. Because of this high vapor density, leaked gas tends to accumulate in low-lying areas, bilges, and pump rooms rather than dissipating. This characteristic creates a persistent fire and explosion hazard that requires specialized ventilation and monitoring.