This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - II, Subject name: Gynaecology & Obstetrics
[{'content': 'The after coming head of the baby in a breech delivery can be arrested by all of the following except: \nSelect and explain. \nA. Extended head, B. Hydrocephalus, C. Placenta pre, D. Incomplete dilatation of the cervix', 'role': 'user'}, {'content': 'Answer: C \nExplanation: If a whole baby can make its way from breech onwards till the head, then even if there is a placenta pre, it will not obstruct the fetal head to come though since there was no obstruction to the whole fetus.', 'role': 'assistant'}]