Which category has a 0.5 rem annual dose limit?

• A. Whole body - tissues and organs
• B. Lens of the eye
• C. Skin, Hands, Feet
• D. None of the above

Answer: (A)

Understanding how dose limits are arranged helps here: different parts of the body have different annual exposure limits, with the numbers reflecting how sensitive each area is to radiation. In many safety references, the ranges are set so that the whole body can receive a higher limit than the eyes or the skin, since the whole body cap covers all tissues together, while the eyes and skin have their own specialized, often stricter, limits. The 0.5 rem figure is a very small limit and, in common guidance, is associated with sensitive situations such as fetal exposure during pregnancy rather than a general whole-body limit. In the context of this item, the category described as the whole body is given a 0.5 rem annual limit, which aligns with the choice being the best match among the options presented in that source. The other categories show higher limits (lens of the eye around 15 rem and skin/hands/feet around 50 rem), so they don’t fit the 0.5 rem value.