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
[{'content': "Highest mortality in pregnancy- \nSelect and explain. \nA. Eisenmenger syndrome, B. Fallot's tetrologv, C. Coarctation of aorta, D. Marfan’s syndrome", 'role': 'user'}, {'content': "Answer: A \nExplanation: Eisenmenger syndrome \n\nThese 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%).\nFallot’s tetralogy, cocoarctationf aorta & Marfan's syndrome hav mortality’ rate of 5-10%, 3-9% & 25% respectively.", 'role': 'assistant'}]