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': 'A two-month-old infant is brought to the hospital emergency with marked respiratory distress. On examination, the infant has cyanosis and bilateral crepitations. Hea 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 bih. 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 aeries, C. Cystic fibrosis, D. Tetralogy of Fallot', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Transposition of great aeries", 'role': 'assistant'}]