Which workers entering zone 2, zone 3, or unzoned areas are explicitly mentioned for dosimeter use?

• A. Pregnant Workers
• B. All Workers
• C. Visitors
• D. Contractors

Answer: (A)

The key idea is that radiation safety rules sometimes single out certain worker groups for explicit dosimeter use when entering higher-exposure areas. In this case, pregnant workers are specifically referenced to wear a dosimeter whenever entering zone 2, zone 3, or unzoned areas. The reason is fetal sensitivity to ionizing radiation, so monitoring the dose they receive helps protect the fetus and keeps exposure within safe limits. Other groups (visitors, all workers, contractors) may have dosimetry requirements in some situations, but they are not singled out in the same explicit way for these zones, so the option identifying pregnant workers is the best answer.