This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'True about TPN \nSelect and explain. \nA. Carbohydrate forms about 40% of energy source, B. In abdominal injury early parenteral nutrition should be staed, C. Proteins forms 60% of energy source, D. Lipids form 20% of energy source', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Calories from amino acid 20-25% lipids 20% dextrose 55-60% Abdominal injuries, we need not sta TPN unless we anticipate atleast 2 weeks of bowel rest.', 'role': 'assistant'}]