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Vitamin D can be made in human skin on exposure to what?

AInfrared heat
BRadio waves
CVisible red light
DUltraviolet light
Answer & Solution
Correct answer: D. Ultraviolet light
1. The question asks about: Vitamin D can be made in human skin on exposure to what? 2. Correct answer: Ultraviolet light. people who get sufficient exposure to ultraviolet light, either from the sun or an artificial source, synthesize vitamin D in the skin... 3. Why the others fail: Only ultraviolet light triggers synthesis in skin. _Source: Wikipedia, Nutrient, Vitamins and vitamers_
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