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': 'Biological value is maximum in: \nSelect and explain. \nA. Egg, B. Milk, C. Soyabean, D. Pulses', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Egg', 'role': 'assistant'}]