This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular Disorders, Subject name: Gynaecology & Obstetrics
[{'content': "Heart disease with worst prognosis for mother and fetus in pregnancy is - \nSelect and explain. \nA. Mitral regurgitation, B. Eisenmenger's complex, C. Coarctation of aorta, D. Mitral stenosis", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' Eisenmenger complex. This has been explained already that worst prognosis in pregnancy is associated with pulmonary hypertension and in Eisenmenger complex pulmonary hypertension is a prominent feature.", 'role': 'assistant'}]