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
65 year old patient comes with dysphagia and regurgitation. Barium swallow shows diverticula at lower oesophagus. Which of the following is false about this condition 
Select and explain. 
A. Endoscopy is used to rule out malignancy, B. Chest x ray shows air fluid level in posterior mediastinum, C. It arises from killians triangle, D. Treatment is resection Plus myotomy
C: It arises from killians triangle
Answer: C: It arises from killians triangle 
Explanation: This is the case of epiphanic diverticulum. It is usually seen in lower oesophagus. It is confused with para esophageal hernia.