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 minimum amount of proteins needed for positive nitrogen balance is - \nSelect and explain. \nA. 20-30 gm/day, B. 35-40 gm/day, C. 50 gm/day, D. 60 gm/day', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The minimum amount of proteins needed to maintain nitrogen equilibrium is about 0.8 gm/kg of protein per day i.e. about 56 to 60 gm. of protein per day.', 'role': 'assistant'}]