This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'Prepyloric channel ulcer is of grade \nSelect and explain. \nA. 1, B. 2, C. 3, D. 4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Type 1- In the antrum near the lesser curve, Type 2- combined gastric ulcer ( in the body) with duodenal ulcer, Type 3 - prepyloric ulcer, Type 4 - gastric ulcer in the proximal ulcer or cardia. Reference : SRB edition : 5 page: 824', 'role': 'assistant'}]