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Chemistry Medium PMS Uploaded: 04 Sep 2026

Which vitamin is synthesized in human skin upon exposure to sunlight?

  • A Vitamin D
  • B Vitamin C
  • C Vitamin B12
  • D Vitamin A
Correct Answer: Option A — Vitamin D
Explanation:
Vitamin D is synthesized in the skin when it is exposed to ultraviolet B (UVB) radiation from sunlight, triggering a chemical reaction that converts a cholesterol derivative into active vitamin D.
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