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': "Zenker's diverticulum - all are false except: - \nSelect and explain. \nA. True diverticulum, B. Lies in mid- esophagus, C. Treatment is by diverticulectomy, D. Senile change", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Treatment is by diverticulectomyRef: Bailey 26th 1018* It is a false diverticulum.* Disease common in old age (Senile)* MC in neck - presents as swelling in posterior triangle.* Zenker diverticulum is treated with Diverticulectomy', 'role': 'assistant'}]