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
Which is M.C. site for iatrogenic oesophageal perforation - 
Select and explain. 
A. Abdominal portion, B. Cervical portion, C. Above arch of aorta, D. Below arch of aorta
B: Cervical portion
Answer: B: Cervical portion 
Explanation: None