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': 'A patient is on total Parenteral nutrition. Which of the following nutrient deficiency he might develop? \nSelect and explain. \nA. Vitamin B12, B. Folic acid, C. Vitamin B6, D. Zinc', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]