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
Smoking causes all except 
Select and explain. 
A. Preterm birth, B. Pre eclampsia, C. Abruptio placenta, D. Intra uterine fetal demise
B: Pre eclampsia
Answer: B: Pre eclampsia 
Explanation: Risk of smoking in pregnancy includes:

Placental abruption
Premature rupture of membrane
Sudden infant death.