See how good is your general knowledge when it comes to human health.
Exposure to sunlight helps a person improve his health because
A. the infrared light kills bacteria in the body
B. resistance power increases
C. the pigment cells in the skin get stimulated and produce a healthy tan
D. the ultraviolet rays convert skin oil into Vitamin D
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Answer: Option D
The ultraviolet rays convert skin oil into Vitamin D which is an essential vitamin needed by human body.
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