This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Pediatrics
[{'content': 'Acute onset of cough, stridor and respiratory distress in the absence of fever is suggestive of: \nSelect and explain. \nA. Foreign body, B. Acute asthma, C. Aspiration Pneumonia, D. Primary complex', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Foreign bodyImmediate symptoms of foreign body inhalation include choking, coughing, increasing respiratory distress or difficulty in speaking.', 'role': 'assistant'}]