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': 'A patient with peptic ulcer disease undergone billroth 2  gastrectomy. Later the patient presented with postprandial pain. On endoscopy oedematous and inflamed gastric mucosa has been found. What is the  preferred diagnosis \nSelect and explain. \nA. Alkaline gastritis, B. Dumping syndrome, C. Gastroparesis, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Reflex of duodenal juices into the stomach after billroth surgery e will cause inflamed gastric mucosa. Treatment of choice is roux en y gastrojejunostomy.', 'role': 'assistant'}]