The triad of &;diarrhea, dementia, and dermatitis&; is characteristically seen in the deficiency of vitamin _______________
High-Yield Explanation
Niacin deficiency results in pellagra.The early symptoms are vague. Anorexia, lassitude, weakness, burning sensations numbness and dizziness may be prodromal symptoms, After a long period of deficiency, the classic triad of dermatitis, diarrhea and dementia appears. Ref: Page 182; Nelson textbook of pediatrics; 17th edition