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: Medicine
[{'content': 'Net protein utilization of egg is \nSelect and explain. \nA. 96, B. 81, C. 79, D. 45 - 50', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]