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': 'Unequivocal evidence of hea disease in pregnancy is all except : \nSelect and explain. \nA. Systolic murmur, B. Diastolic murmur, C. Diastolic thrill and murmur, D. Systolic thrill and murmur', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Systolic murmur', 'role': 'assistant'}]