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: Gynaecology & Obstetrics
pH of amniotic fluid at later weeks of gestation : 
Select and explain. 
A. 4.5, B. 6.5, C. 7, D. 7.2
D: 7.2
Answer: D: 7.2 
Explanation: 7.2