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 cause of esophageal perforation near cricopharynx: 
Select and explain. 
A. Iatrogenic, B. Trauma, C. Spontaneous, D. Tumor
A: Iatrogenic
Answer: A: Iatrogenic 
Explanation: Ans. (a) IatrogenicRef Bailey and Love 26th Edition, Page 993* Most common site of perforation of esophagus -- Cervical esophagus* Most common cause is Iatrogenic