Risk factor for breech presentation is: (A) Maternal diabetes, (B) Oligohydramnios, (C) Anterior placental implantation, (D) Preeclampsia
Answer is B. Risk factors for breech presentation

Oligohydramnios 
Fundal placental implantation 
Placenta previa 
Hydrocephaly
Twin gestation
Anencephaly
Prior breech delivery