This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
[{'content': 'Which of the following are Nada&;s major criteria for clinical diagnosis of congenital hea disease? \nSelect and explain. \nA. Systolic murmur grade I or II, B. Diastolic murmur, C. Abnormal blood pressure, D. Abnormal electrocardiogram', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nadas&; Criteria The assessment for presence of hea disease can be done using the Nadas&; criteria. Presence of one major or two minor criteria is essential for indicating the presence of hea disease. Nadas&; criteria for clinical diagnosis of congenital hea disease Major Minor Systolic murmur grade III or more Systolic murmur grade I or II Diastolic murmur Abnormal second sound Cyanosis Abnormal electrocardiogram Congestive cardiac failure Abnormal X-ray Abnormal blood pressure Reference: Essential Paediatrics; O.P. Ghai; Page no: 406', 'role': 'assistant'}]