This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'Protein requirement in adult male \nSelect and explain. \nA. 0.5 gm/kg/day, B. 1 gm/kg/day, C. 1.5 gm/kg/day, D. 2 gm/kg/day', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ref:Park's Textbook of Preventive and Social Medicine 25th Ed Pgno : 662", 'role': 'assistant'}]