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: Anatomy
Length of esophagus in adults is: 
Select and explain. 
A. 25 cm, B. 10 cm, C. 15 cm, D. 20 cm
A: 25 cm
Answer: A: 25 cm 
Explanation: The esophagus is a muscular, collapsible tube about 10 in. (25 cm) long that joins the pharynx to the stomach. The esophagus enters the abdomen through an opening in the right crus of the diaphragm.After a course of about 0.5 in. (1.25 cm), it enters the stomach on its right side.