This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Post Paum Haemorrhage (This better stop now !), Subject name: Gynaecology & Obstetrics
[{'content': 'Most common cause of secondary postpaum hemorrhage:- \nSelect and explain. \nA. Trauma, B. Atonic uterus, C. Bleeding disorders, D. Retained products of conception', 'role': 'user'}, {'content': "Answer: D \nExplanation: Most common cause of secondary postpaum hemorrhage is retained tissues Secondary postpaum hemorrhage is bleeding 24 hours to 12 weeks after delivery. Causes of PPH(10 and 20) : Uterine atonicity Injury to any pa of genital tract Coagulopathy (von Willebrand's disease) Retained tissues - MCC of 20PPH", 'role': 'assistant'}]