This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiac and Pericardiac Imaging, Subject name: Radiology
[{'content': "Snowman appearance on x-ray is seen in which cardiac pathology - \nSelect and explain. \nA. Fallots tetralogy, B. TAPVC, C. TGA, D. Ebstein's anomaly", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., TAPVC o Snowman\'s sign is seen in supracardiac TAPVC.Cardiac configrationo "Boot-shaped" heart (cour en sabot)o "Egg on side" heart ("egg in cup" heart)o "Egg in cup" Hearto "Snowman" sign ("figure of 8, or cottage loaf" sign)o "Ground - glass" appearance of lungo "Sitting-duck" hearto "Water-bottle" or flashed shaped or money bag hearto "Box-shaped" hearto Tubular hearto "Tear -drop" hearto "Cor-triatum"o "Jug handle" appearanceo "Pentagon-shaped" hearto "Triangular-shaped" heartFallot\'s tetralogyTransposition of great arteriesConstrictive pericarditisSupracardiac TAPVCObstructive TAPVCPersistent truncus arteriosusPericardial effusion, hypothyroidismTricuspid atresia, Ebstein\'s anomalyAddison\'s disease, emphysemaChronic emphysemaPulmonary vein obstructionPrimary pulmonary hypertensionMitral incompetenceConstrictive pericarditis', 'role': 'assistant'}]