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 cause of esophageal perforation near cricopharynx: \nSelect and explain. \nA. Iatrogenic, B. Trauma, C. Spontaneous, D. Tumor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) IatrogenicRef Bailey and Love 26th Edition, Page 993* Most common site of perforation of esophagus -- Cervical esophagus* Most common cause is Iatrogenic', 'role': 'assistant'}]