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: Orthopaedics
[{'content': 'All of the following statements are true about development dysplasia (DDH) of the hip, except - \nSelect and explain. \nA. It is More common in females, B. Oligohydranmios is associated with a higher risk of DDH, C. The hourglass appearance of the capsule may prevent a successful closed reduction, D. Twin pregnancy is a known risk factor', 'role': 'user'}, {'content': 'Answer: D \nExplanation: "Uterus in twin pregnancy cannot be regarded as a risk factor for DDH". — Journal of pediatric orthopedics\n\nDDH is more common in females.\nOligohydramnios is a risk factor for DDH.', 'role': 'assistant'}]