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: Medicine
[{'content': 'Zinc deficiency causes –  a) Hypo gonadism  b) Diarrhoea  c) Pigmentation  d) Psychosis  e) Defective carbohydrate metabolism \nSelect and explain. \nA. ab, B. acd, C. abd, D. bcd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]