This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'All can cause recurrent pulmonary infection except \nSelect and explain. \nA. VSD, B. Recurrent LVF, C. TOF, D. ASD', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref Harrison 19 th ed pg 1526 TOF doesnit predispose infections because : The severity of RV outflow obstruction determines the clinical presentation. The severity of hypoplasia of the RV outflow tract varies from mild to complete (pulmonary atresia). Pulmonary valve stenosis and supravalvular and peripheral pulmonary aerial obstruction may coexist; rarely, there is unilateral absence of a pulmonary aery (usu- ally the left). A right-sided aoic arch and descending thoracic aoa occur in ~25%.', 'role': 'assistant'}]