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
[{'content': '65 year old patient comes with dysphagia and regurgitation. Barium swallow imaging is given. What is the diagnosis \nSelect and explain. \nA. Epiphanic diverticulum, B. Para esophageal hernia, C. Zenker diverticulum, D. Diaphragmatic hernia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]