Which radiation type is associated with minimal erythema persisting for 24-26 hours?

• A. Infrared radiation
• B. Ultraviolet radiation
• C. Minimal erythema
• D. Second-degree erythema

Answer: (C)

When skin is exposed to UV light, the redness that appears can vary in intensity and duration. The mild, precisely timed response is called minimal erythema: a faint reddening that becomes noticeable about 24 hours after exposure and tends to last around a day, roughly 24–26 hours. This specific pattern—very light redness that persists roughly a day after UV exposure—fits the description given, making minimal erythema the best match.

Infrared exposure mainly causes heat without producing this distinct, short-lived redness pattern. A second-degree erythema would indicate a more serious burn with potential blistering and a longer healing time. So the term that best captures a faint, UV-induced reddening lasting about a day is minimal erythema.