What kind of fire extinguisher media is forbidden?

The correct answer is carbon tetrachloride. This substance is classified as a halogenated hydrocarbon and has been widely recognized as a toxic and hazardous material. Its use as an extinguishing agent has been banned or heavily restricted due to the health risks it poses, including its potential to cause liver damage, respiratory issues, and other serious health effects. Additionally, carbon tetrachloride can produce harmful fumes when burned, which contributes to its prohibition in fire extinguishing applications.

In contrast, the other options—carbon dioxide, foam, and water—are approved fire extinguishing media commonly used in a variety of fire situations. Carbon dioxide is effective for electrical fires and flammable liquids, foam is advantageous for fighting liquid fires, and water is widely used for solid materials. Each of these media has a role in fire safety, making them acceptable choices compared to carbon tetrachloride, which poses significant health and environmental hazards.