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: Medicine
[{'content': 'All except one is false regarding tetrology of fallot \nSelect and explain. \nA. S2 in single, B. Blue TOF murmur is loud, C. These patients will develop congestive cardiac failure in near future, D. With age  proceeds to cardiomegaly', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In TOF , there is no congestion due to pulmonary oligemia,. So these patients will never develop congestive cardiac failure or cardiomegaly.\xa0 In blue TOF\xa0 there is silent chest due to equalization of RV and LV pressure .', 'role': 'assistant'}]