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
Highest mortality in pregnancy- 
Select and explain. 
A. Eisenmenger syndrome, B. Fallot's tetrologv, C. Coarctation of aorta, D. Marfan’s syndrome
A: Eisenmenger syndrome
Answer: A: Eisenmenger syndrome 
Explanation: Eisenmenger syndrome 

These patients have pulmonary hypertension with shunt (right to left) through an open ductus or ASD or VSD. Maternal mortality is high i.e. 50% & so is a perinatal loss (50%).
Fallot’s tetralogy, cocoarctationf aorta & Marfan's syndrome hav mortality’ rate of 5-10%, 3-9% & 25% respectively.