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
All of the following statements are true about development dysplasia (DDH) of the hip, except - 
Select and explain. 
A. 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
D: Twin pregnancy is a known risk factor
Answer: D: Twin pregnancy is a known risk factor 
Explanation: "Uterus in twin pregnancy cannot be regarded as a risk factor for DDH". — Journal of pediatric orthopedics

DDH is more common in females.
Oligohydramnios is a risk factor for DDH.