What is a common sign that indicates a potential radiation hazard?

A yellow triangle with a black symbol is recognized internationally as a warning sign for radiation hazards. This symbol is part of the standard nuclear regulatory signage used to indicate areas where radiation is present and where caution is required. The triangle shape draws attention, while the yellow color signifies a warning or alert. The black symbol typically represents a radiation warning, making it clear to individuals that they should take appropriate safety measures when in the vicinity of potential radiation exposure. This is critical for maintaining safety standards around hazardous materials and environments.

In contrast, the other options do not signify radiation hazards and may represent different warnings or indicators unrelated to radiation safety. Understanding these symbols is essential for professionals working in environments where radiation may be present.