This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical & Surgical Illness Complication Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common heart disease associated with pregnancy is: \nSelect and explain. \nA. Mitral stenosis, B. Mitral regurgitation, C. Patent ductus arteriosus, D. Tatralogy of Fallot', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a, i.e. Mitral stenosisRef. Dutta Obs. 7/e, p 275; Fernando Arias 3/e, p 522In developing countries like India:Most common heart disease in pregnancy is of rheumatic origin, followed by the congenital heart disease.Most common rheumatic valvular lesion is mitral stenosis (in 80%) followed by mitral regurgitation and aortic stenosis.In developed countries:Most common heart disease is congenital heart disease QMost common lesion is Atrial septal defect Q', 'role': 'assistant'}]