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. Fallot's tetrologv, B. Coarctation of aorta, C. Marfan’s syndrome, D. Eisenmenger syndrome
D: Eisenmenger syndrome
Answer: D: 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, coarctaion of aorta & Marfan's syndrome hav mortality’ rate of 5-10%, 3-9% & 25% respectively