Multiple choice Deficiency of this vitamin leads to Pellagra disease ? Riboflavin Niacin Biotin Retinol Reveal answer Fill a bubble to check yourself B Correct answer Explanation Pellagra is a systemic disease caused by a deficiency of niacin (Vitamin B3) or its precursor tryptophan. It is characterized by the 'three Ds': dermatitis, diarrhea, and dementia.