The 3 D’s , Dermatitis, Diarrhea, Dementia are seen in the deficiency of HomeVitamins MCQsThe 3 D’s , Dermatitis, Diarrhea, Dementia are seen in the deficiency ofQ. The 3 D’s , Dermatitis, Diarrhea, Dementia are seen in the deficiency ofA. ThiamineB. RiboflavinC. NiacinD. PyridoxineAnswer: Niacin