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: Surgery
Most common benign esophageal tumour is: 
Select and explain. 
A. Leiomyoma, B. Rhabdomyoma, C. Adenoma, D. none of the above
A: Leiomyoma
Answer: A: Leiomyoma 
Explanation: Leiomyomas constitute more than 50% of benign esophageal tumors. Ref: Schwaz's principle of surgery 9th edition, chapter 25.