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': 'Acrodermatitis enteropathica is due to deficiency of \nSelect and explain. \nA. Zinc, B. Vitamin B3, C. Calcium, D. Vitamin B6', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]