This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Pediatrics
[{'content': 'Pulmonary plethora in a child presenting with cynosis, is seen in? \nSelect and explain. \nA. Tetralogy of Fallot, B. Total anomalous pulmonary venous connection, C. Coarctation of aoa, D. Tricuspid Atresia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pulmonary plethorais a term used to describe the appearances of increased pulmonary perfusion on Chest radiographs Usually a left-to-right shunt of 2:1 is required for pulmonary plethora to occur. Increased pulmonary perfusion occurs in a number of situations: Left-to-right cardiac shunts, e.g. ASD, VSD, PDA Paial or total anomalous pulmonary venous connections Transposition of the great aeries Truncus aeriosus Vein of Galen malformation It may also been seen in healthy patients with increased cardiac output (e.g. pregnancy). Pulmonary plethora can occur with or without cyanosis with different causes attributed: without cyanosis:left-to-right shunt with cyanosis:transposition of great aeries, TAPVC, Truncus aeriosus', 'role': 'assistant'}]