This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Skin
[{'content': 'Acrodermatitis enteropathica is caused by deficiency of? \nSelect and explain. \nA. Copper, B. Zinc, C. Magnesium, D. Selenium', 'role': 'user'}, {'content': "Answer: B \nExplanation: ANSWER: (B) ZincREF: Rook's 8th ed p. 59.73Indirect repeat Dermatology June 2011", 'role': 'assistant'}]