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
Paogram helps in detecting 
Select and explain. 
A. Abruptio placenta, B. Obstructed labour, C. Incoordinate uterine action, D. PPH
B: Obstructed labour
Answer: B: Obstructed labour 
Explanation: Obstructed labour