This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Gynaecology & Obstetrics
[{'content': 'After coming head of breech will have difficulty in delivery in all of the following condition s except: \nSelect and explain. \nA. Hydrocephalus, B. Placenta pre, C. Incomplete dilation of cervix, D. Extension of head', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Placenta prae Defined as a placenta located paly or completely in the lower uterine segment.The bleeding is called inevitable or unavoidable haemorrhage as dilatation of internal os inevitably results in haemorrhage (refer pgno:128 Sheila textbooks of obstetrics 2 nd edition)', 'role': 'assistant'}]