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Question
which of the following is a feature of vitamin d synthesis?
a.tanning lamps and tanning booths do not stimulate vitamin d synthesis
b.sunscreens with sunburn protection factors of 2 and above prevent synthesis of vitamin d
c.the ultraviolet rays of the sun are able to easily pierce heavy clouds and smog to promote vitamin d synthesis
d.dark-skinned people require longer sunlight exposure than light-skinned people to synthesize equivalent amounts of vitamin d
Answer
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