This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Specific gravity of amniotic fluid 
Select and explain. 
A. 1.213, B. 1.01, C. 1.51, D. 1.1
B: 1.01
Answer: B: 1.01 
Explanation: Specific gravity of the amniotic fluid is 1.010 Fluid is faintly alkaline It becomes highly hypotonic to maternal serum at term pregnancy Ref: Dutta Obs 9e pg 34.