What is the primary hazard of liquefied petroleum gas and liquefied natural gas?

Correct Answer: Option B — flammability

Liquefied petroleum gas and liquefied natural gas are primarily hazardous due to their extreme flammability. While they are also cryogenic and pressurized, the primary risk during a containment failure is the formation of a flammable vapor cloud, which can ignite if it encounters an ignition source, leading to fire or explosion.