What is the primary health and safety hazard when propane leaks occur indoors?

• A. Propane can accumulate and displace oxygen; evacuate, ventilate, and eliminate ignition sources.
• B. Propane leaks primarily cause corrosion of metal surfaces.
• C. Propane leaks pose only a minor risk and do not require evacuation.
• D. Propane leaks cause immediate skin burns.

Answer: (B)

Propane indoors poses a health risk mainly because it can build up in the air and displace oxygen, creating a real suffocation hazard. Because propane is heavier than air, it tends to collect in low spots and poorly ventilated areas, so people can be affected even without a visible flame. The best response is to evacuate people from the area, ventilate to dilute the gas, and eliminate ignition sources to prevent fire or explosion. The other ideas miss the core danger: corrosion is not the primary health risk, leaks are not a minor issue requiring no action, and gas exposure does not inherently cause immediate skin burns.