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
True labour differs from false labour by all except: 
Select and explain. 
A. Absence of 'bag of water', B. Painful uterine contractions, C. Progressive effacement and dilatation of the cervix, D. Pain often felt in front of the abdomen or radiating towards the thighs
A: Absence of 'bag of water'
Answer: A: Absence of 'bag of water' 
Explanation: Absence of 'bag of water'