This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Surgery
[{'content': 'Most common impacted foreign body in esophagus in children is \nSelect and explain. \nA. Coin, B. Food product, C. Krayon, D. Marble', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Coin Foreign body impaction* Most impacted foreign bodies do not get impacted in the oropharynx. The most common exceptions are fish and chick bones.* These objects most often lodge in the soft tissues at the base of tongue, but they can also lodge in the tonsil or the pyriform fossa.* Coins are the most commonly impacted foreign bodies in children in esophagus and oropharynx followed by the food products.", 'role': 'assistant'}]