Pathology The clinical combination of dermatitis, diarrhoea, and dementia resulting from a deficiency of niacin is referred to as: A Beriberi B Marasmus C Pellagra D Rickets 💡 Explanation The clinical combination of dermatitis, diarrhoea, and dementia resulting from a deficiency of niacin is referred to as: ✓ Correct Answer: C. Pellagra