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 9 month old infant presents with a 2–day history of fever, cough and breathlessness following an upper respiratory infection. She is febrile and has a respiratory rate of 80/min. Intercostal and subcostal retractions and extensive rhonchi on auscultation. A chest X–ray reveals a hyperinflated chest – \nSelect and explain. \nA. Bronchial asthma, B. Foreign body aspiration, C. Bacterial pneumonia, D. Bronchiolitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]