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
All of the following are true of placenta previa except:a) Postpartum hemorrhage infrequentb) First trimester bleeding is not uncommonc) Premature labour is commond) Higher incidence in women with lower segment cesarean sectione) Malposition and malpresentation are common 
Select and explain. 
A. ac, B. a, C. ab, D. bc
C: ab
Answer: C: ab 
Explanation: Placenta previa is a cause of APH which means bleeding from or into the genital tract after the 28th week of pregnancy i.e. it is not a cause of first trimester bleeding. (i.e. option b is incorrect).
As discussed earlier, previous cesarean section increase the chances of placenta previa in next pregnancy (i.e. option d is correct).
As far as other options are concerned - they are all complications of placenta previa.
Complications of placenta previa
A. Maternal

Antepartum, Intrapartum and Postpartum= Hemorrhage
Malpresentation
Cord prolapse
Retained placenta
Preterm labour
Premature rupture of membranes
Slow dilatation of cervix

B. Fetal

Asphyxia
Birth injuries
Low birth weight
Congenital malformation
Intrauterine death