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': 'A 4 year child was brought with the following finding on the chest X ray. What is the probable location of the foreign body visible on the skiagram? \nSelect and explain. \nA. Trachea, B. Esophagus, C. Vallecula, D. Right main bronchus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: b. EsophagusThe coin shadow being visible fully in AP view and the thickness being visible in lateral view, suggest its position in esophagus', 'role': 'assistant'}]