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
[{'content': "Commonest complication of Zenker's diveiculum is: \nSelect and explain. \nA. Dysphonia, B. Gastroesophageal reflux, C. Lung abscess, D. Perforation", 'role': 'user'}, {'content': "Answer: C \nExplanation: 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.", 'role': 'assistant'}]