This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
[{'content': 'A two-month-old infant is brought to the hospital emergency with marked respiratory distress. On examination, the infant has cyanosis and bilateral crepitations. Heart rate is 180/min, respiratory rate 56/min and the liver span 7.5 cm. The child has had repeated episodes of fever, cough and respiratory distress since the time of birth. Cardiovascular examination reveals a grade III ejection systolic murmur in left parasternal area and the chest X-ray reveals cardiomegaly with a narrow base and plethoric lung fields. What is the most likely diagnosis? \nSelect and explain. \nA. Congenital methemoglobinemia, B. Transposition of great arteries, C. Cystic fibrosis, D. Tetralogy of Fallot', 'role': 'user'}, {'content': "Answer: B \nExplanation: b. Transposition of great arteries(Ref: Nelson's 20/e p 2223-2225, Ghai 8/e p 424-426)In the given case scenario, an infant has features of heart failure, cyanosis with repeated episodes of pneumonia suggesting incree pulmonary blood flow. These clinical features along with the chest X ray findings are suggestive of Transposition of great arteries", 'role': 'assistant'}]