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
Prepyloric channel ulcer is of grade 
Select and explain. 
A. 1, B. 2, C. 3, D. 4
C: 3
Answer: C: 3 
Explanation: 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