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: Social & Preventive Medicine
[{'content': 'In Niacin deficiency, all of the following are seen except: \nSelect and explain. \nA. Deafness, B. Diarrhea, C. Dementia, D. Dermatitis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Deafness o Niacin deficiency results in 'Pellagra'Pellagra is identified by the presence of three 'D's --> Diarrhea, Dementia, Dermatitis", 'role': 'assistant'}]