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': 'Whey : Casein ratio in breast milk is \nSelect and explain. \nA. 3:07, B. 8:03, C. 7:03, D. 3:08', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]