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 \nSelect and explain. \nA. Is due to pyridoxine deficiency, B. Occurs with diet chiefly on maize, C. Night blindness is a presenting feature, D. Causes high output cardiac failure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: • RDA is often higher than the recommended minimum requirement: RDA includes both daily requirement and some additional requirement for periods of growth or illness.', 'role': 'assistant'}]