Casal’s necklace is seen in deficiency of: September 2012
Correct Answer: Niacin
Description: Ans: B i.e. Niacin The Casal collar or Casal necklace is a clinical sign in which there is erythematous pigmented skin rash in the distribution of a broad collar (dermatomes C3 and C4). It is seen in patients with pellagra.
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