This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: nutrition and digestion, Subject name: Biochemistry
[{'content': 'All the following are trace elements required by body except \nSelect and explain. \nA. Zinc, B. Copper, C. Selenium, D. Boron', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Major elements. Trace elements 1. Calcium. 1. Iron 2. Magnesium. 2. Iodine 3. Phosphorus. 3. Copper 4. Sodium. 4. Manganese 5. Potassium. 5. Zinc 6. Chloride. 6. Molybdenum 7. Sulfur. 7. Selenium 8. Fluoride.Ref: DM Vasudevan, page no: 411', 'role': 'assistant'}]