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
Cow's milk contains what % proteins – 
Select and explain. 
A. 1.1, B. 3.2, C. 3.5, D. 4.1
B: 3.2
Answer: B: 3.2 
Explanation: None