Is it true that AC refrigerant gases are toxic and flammable?

The statement that AC refrigerant gases are toxic and flammable is true, making the choice correct. Many refrigerants used in air conditioning systems can pose health risks if inhaled, as they may displace oxygen or cause respiratory issues. Some refrigerants can also be flammable under certain conditions, particularly at high temperatures or in the presence of an ignition source.

While not all refrigerants are equally hazardous, it is crucial to treat them with caution and follow safety guidelines when handling them. This recognition of potential hazards is essential in the fire inspection context, as it underscores the importance of understanding the materials in use within a building's systems and the associated risks.

The other options suggest otherwise, either minimizing the dangers or incorrectly stating that refrigerants are universally safe, which is not aligned with industry knowledge regarding refrigerants.