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: Pediatrics
[{'content': 'Commonest cause of hea failure in infancy is - \nSelect and explain. \nA. Myocarditis, B. Rheumatic fever, C. Cardiomyopathy, D. Congenital hea disease', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Congenital hea disease Congestive hea failure o Congestive hea failure is state in which the hea cannot produce the cardiac out required to sustain the metabolic needs of the body, without evoking ceain compensatory mechanism. o The most common cause of CHF in infants --> Congenital hea disease. o The most common cause of CHF in the older children --> Rheumatic fever & rheumatic hea disease.", 'role': 'assistant'}]