The area of the body most sensitive to ultraviolet radiation

• A. Face
• B. Hands
• C. Feet
• D. Arms

Answer: (A)

The key idea is that how UV damage occurs depends on skin thickness and how much the area is exposed. The face tends to be the most sensitive because the skin there is relatively thin and delicate, and this area is usually the most exposed to sunlight. When UV rays hit thinner skin, they penetrate more easily and can cause sunburn, aging, or other damage more quickly than thicker-skin areas.

Hands can be exposed as well, but the skin on the backs of the hands is typically thicker and more resilient than facial skin, so it’s less sensitive overall. Feet are often shielded or have thick skin on the soles, providing more protection. Arms get sun exposure too, but much of the area may have thicker skin or be covered more often, reducing relative vulnerability compared with the face.

So, the face is the best answer because of its combination of high exposure and thinner, more delicate skin.