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
[{'content': 'Which of the following is not an etiology of cord prolapse? \nSelect and explain. \nA. Contracted pelvis, B. Hydramnios, C. Placenta pre, D. Dextrarotated uterus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dextrarotated uterus is a normal physiological changed seen in pregnancy. ETIOLOGY: Malpresentations:transverse (5-10%) and breech (3%) Contracted pelvis Prematurity Twins Hydramnios Placental factor:placenta pre Iatrogenic: lLow rupture of the membranes, manual rotation of the head, ECV, IPV Stabilizing induction', 'role': 'assistant'}]