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': 'Pellagra in jowar eating population is due to ? \nSelect and explain. \nA. Niacin in bound form, B. Deficiency of tryptophan, C. Excess of leucine, D. High consumption of milk and milk products', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Excess of leucine", 'role': 'assistant'}]