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: Pediatrics
Percentage of lactose in human milk is – 
Select and explain. 
A. 7.2gm, B. 4.5gm, C. 8.0gm, D. 6.7gm
A: 7.2gm
Answer: A: 7.2gm 
Explanation: It is not exactly 7.2% but it is the closest choice.