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: Medicine
Commonest complication of Zenker's diveiculum is: 
Select and explain. 
A. Dysphonia, B. Gastroesophageal reflux, C. Lung abscess, D. Perforation
C: Lung abscess
Answer: C: Lung abscess 
Explanation: Answer is C (Lung Abscess) The most frequent complications of Zenker diveiculum is `aspiration' into the tracheobronchial tree which can in turn present with pneumonia and Lung Abscess.