Difficulty: Easy
Correct Answer: Melanin
Explanation:
Given data
Concept / ApproachMelanin, produced by melanocytes and transferred to keratinocytes, provides baseline pigmentation and darkens with UV exposure.
EliminationCarotene imparts a yellowish hue; hemoglobin influences redness beneath skin; bilirubin increase causes jaundice, not normal pigmentation.
Final AnswerMelanin.
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