Which of the following is NOT a recognized badge type for monitoring radiation exposure?

The identification of "Radiation meter badges" as the option that is NOT a recognized badge type for monitoring radiation exposure is based on the understanding that traditional dosimetry badges are designed specifically for personal monitoring of radiation exposure.

Film badges, OSL (Optically Stimulated Luminescence) badges, and TLD (Thermoluminescent Dosimeter) badges are all established and widely used types of dosimeters that track and measure an individual's exposure to radiation over time. Each of these types has its unique method of recording exposure. Film badges use photographic film, OSL badges utilize a luminescent material that fluoresces when exposed to radiation, and TLDs contain materials that store energy from ionizing radiation, which can be released as light when heated.

In contrast, a "radiation meter badge" is not a recognized type of dosimeter. The term suggests a more active measurement device rather than a passive badge worn for personal dosimetry. Therefore, it does not fit into the established categories of personal radiation monitoring badges. This distinguishes it from the other options, which are legitimate dosimetric devices used for assessing exposure to ionizing radiation.