What is the allowable dose limit for extremities in mrem/year?

The allowable dose limit for extremities is set at 50,000 mrem/year, which is equivalent to 50 rem/year. However, within the context of this question, option C is the most relevant since it suggests the highest level of dose limit for extremities provided in the choices, which aligns with the regulations often referenced for specific tissue exposures.

The extremity dose limit is typically higher than that for the whole body, reflecting the fact that hands and forearms may be exposed to higher levels of radiation during certain tasks. The more restrictive doses listed in other options do not represent appropriate limits for extremities. While regulatory standards can vary depending on specific circumstances or organizations, the higher end reflects the typical understanding of the limits that are designed to protect workers who may be exposed to radiation in their line of work, especially in environments like nuclear facilities, medical imaging contexts, or research labs. By understanding the regulatory framework, it becomes easier to appreciate the significance of the extremity dose limitations.