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': "Worst prognosis is seen in pregnant women with cardiac lesion is : \nSelect and explain. \nA. Mitral stenosis, B. Co-arctation of aoa, C. Eisenmenger syndrome, D. Tetralogy of fallot's", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Eisenmenger syndrome', 'role': 'assistant'}]