Question

question 26 which of the following is a symptom of severe niacin deficiency?
○ sensitivity to the cold
○ slow metabolism
○ casals necklace
○ sensitivity to heat

Explanation:

Niacin (vitamin B3) deficiency can lead to pellagra. A characteristic skin lesion of pellagra, especially in severe cases, is "Casal's necklace"—a dermatological sign appearing as a necklace - like rash on the neck. Sensitivity to cold, slow metabolism, and sensitivity to heat are not typical symptoms of severe niacin deficiency.

Answer:

C. Casal's necklace