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': 'The following is false about Atrial septal defect – \nSelect and explain. \nA. Ostium secundum most common, B. Right to Left Shunt, C. May be associated with TAPVC, D. CCF is very rare', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In ASD there is left to right shunt.\n\nClinical manifestations of ASD\n\nPatients with ASD are generally asymptomatic.\nMild effort intolerance and respiratory tract infection may occur.\nCHF is rare.\n\nPhysical examination\n\nParasternal impulse\nSystolic thrill at 2nd left interspace.\nAccentuation of S1\xa0due to loud tricuspid component.\nWide split and fixed S2\nEjection systolic murmur at the second and third left interspaces.\nDelayed diastolic murmur at the lower left sternal border.\nASD with mitral stenosis → Lutembacher syndrome.', 'role': 'assistant'}]