This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'The clinical combination of dermatitis, diarrhoea, and dementia resulting from a deficiency of niacin is referred to as: \nSelect and explain. \nA. Beriberi, B. Marasmus, C. Pellagra, D. Rickets', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Deficiencies of niacin produce pellagra, a disease that is characterized by the triad of dementia, dermatitis (“glove” or “necklace” distribution), and diarrhoea.', 'role': 'assistant'}]