Correct Answer: (e) None of the above
Solution:Pellagra also called "necklace disease" defines systemic disease as resulting from a marked cellular deficiency of niacin (vitamin B₃). It is characterized by 3 "D"s: diarrhea, dementia and dermatitis. Scurvy is a state of dietary deficiency of vitamin C (ascorbic acid). It causes general weakness, anemia, gum disease, and skin hemorrhages.