This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, 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: - niacin is essential for the metabolism of carbohydrate, fat and protein. It is also essential for the normal functioning of skin , intestinal and nervous system. - niacin deficiency results in pellagra. The disease is characterized by diarrhea, dermatitis and dementia. Reference: Park's textbook of preventive and social medicine, 23rd edition, pg no:619 <\\p>", 'role': 'assistant'}]