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': 'Which of the following method of assessment of quality of protein gives complete assessment of protein quality? \nSelect and explain. \nA. Biological value, B. Net protein utilization, C. Digestibility coefficient, D. Amino acid score', 'role': 'user'}, {'content': "Answer: B \nExplanation: Protein quality is determined by amino acid score and net protein utilization. NPU gives a more complete expression of protein quality than the amino acid score. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 584", 'role': 'assistant'}]