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: Surgery
[{'content': 'The most frequent trace mineral deficiency developing in a patient receiving parenteral alimentation is a deficiency of \nSelect and explain. \nA. Ca, B. Chromium, C. Cobalt, D. Zinc', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Zinc deficiency is marked by an eczematoid rash either diffusely or in interiginous areas. A microcytic anemia can develop from a lack of copper and glucose intolerance and may be associated with a lack of chromium. Daily administration of trace metal supplements obtes these problems.', 'role': 'assistant'}]