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
During suction evacuation in MTP the negative pressure of suction should be : 
Select and explain. 
A. 100 to 200 mm Hg, B. 200 to 300 mm Hg, C. 400 to 600 mm Hg, D. 700 to 900 mm Hg
C: 400 to 600 mm Hg
Answer: C: 400 to 600 mm Hg 
Explanation: 400 to 600 mm Hg