This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Medicine
[{'content': 'In gastric outlet obstruction in a peptic ulcer patient, the site of obstruction is most likely to be: \nSelect and explain. \nA. Antrum, B. Duodenum, C. Pylorus, D. Fundus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Gastric ulcer leads to gastric outlet obstruction causing pyloric stenosis showing HOUR GLASS STOMACH', 'role': 'assistant'}]