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
Most common foreign body in Children in Esophagus 
Select and explain. 
A. Coin, B. Food, C. Krayons, D. marbles
A: Coin
Answer: A: Coin 
Explanation: Ans. (a) CoinRef Bailey And Love 27th edition, Page 1073* Most common foreign body in esophagus in adult - Food bolus due to some underlying pathology causing narrowing* Most common foreign body in esophagus in children is coin* Most common site of foreign body impaction is cricopharynx