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': 'Protein content in 100 grams of cow milk \nSelect and explain. \nA. 4.3, B. 3.2, C. 2.2, D. 1.2', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 3.2", 'role': 'assistant'}]