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: Social & Preventive Medicine
[{'content': 'Which of the following is least in protein quality ? \nSelect and explain. \nA. Gelatin, B. Lactalbumin, C. Albumin, D. Cashewnut protein', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]