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
Amount of protein in 100 ml of cow's milk is: 
Select and explain. 
A. 1 g, B. 3 g, C. 4 g, D. 4.5 g
B: 3 g
Answer: B: 3 g 
Explanation: Amount per 100 ml Cow's milk Human milk Fat 3.8 g 3.7 g Protein 3.3 g 1.1 g Lactose 4.5 g 7 g Ref: Nutrition and Child Development, K.E. Elizabeth, 4th edition pg: 18