Which body part has the highest annual dose limit among the listed values?

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

Answer: (B)

Understanding how dose limits vary by body part helps pick the highest annual limit. The skin, hands, and feet have the highest permissible dose per year (about 500 mSv) because these areas are less radiosensitive overall and can tolerate larger exposures in exchange for protecting more vital tissues. The lens of the eye is much more sensitive to radiation, so its annual limit is much lower (around 20 mSv per year, with tighter rules). The whole body limit (effective dose to the entire body) is also lower (about 50 mSv per year) to shield overall health from systemic effects. Therefore, the highest annual dose limit among the listed options is for the skin, hands, and feet.