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: Medicine
[{'content': 'A patient develops acute respiratory distress, stridor, hyperinflation on one side of chest with decreased breath sound on that side. The most likely cause is - \nSelect and explain. \nA. Asthma, B. Aspiration pneumonia, C. Foreign body aspiration, D. Pleural effusion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]