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': 'Following TPN, weight loss is seen - \nSelect and explain. \nA. Up to 7 days, B. 7-10th day, C. 10-15th day, D. 15th day onwards', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]