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': 'The net protein utilization of rice is - \nSelect and explain. \nA. 20%, B. 40%, C. 63%, D. 81%', 'role': 'user'}, {'content': "Answer: C \nExplanation: 1gm of protein is assumed to be equivalent to 6.25g of N. Rice contain 7g of protein. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 584", 'role': 'assistant'}]