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
What is the pressure inside uterus during second stage of labour : 
Select and explain. 
A. 100-120 mm of Hg, B. 200-220 mm of Hg, C. 300 - 400 mm of Hg, D. 25 mm of Hg
A: 100-120 mm of Hg
Answer: A: 100-120 mm of Hg 
Explanation: 100-120 mm of Hg