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: Anatomy
Uterine contractions are clinically palpabel when there intensity is more than 
Select and explain. 
A. 10 mm Hg, B. 15 mm Hg, C. 20 mm Hg, D. 40 mm Hg
A: 10 mm Hg
Answer: A: 10 mm Hg 
Explanation: Uterine contractions: Palpable when intensity exceeds 10 mm Hg Painful when exceeds 15 mm Hg