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
Gastric ulcer which is 3 cm away from pylorus and associated with duodenal ulcers is classified as: 
Select and explain. 
A. Type 1, B. Type 2, C. Type 3, D. Type 4
C: Type 3
Answer: C: Type 3 
Explanation: Majority of gastric ulcers (GUs) can be attributed to either H. pylori or NSAID-induced mucosal damage. Gastric ulcers have been classified based on their location: Type I occur in the gastric body and tend to be associated with low gastric acid production Type II occur in the antrum and gastric acid can vary from low to normal Type III occur within 3 cm of the pylorus and are commonly accompanied by duodenal ulcers and normal or high gastric acid production Type IV are found in the cardia and are associated with low gastric acid production. Ref: Valle J.D. (2012). Chapter 293. Peptic Ulcer Disease and Related Disorders. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo (Eds), Harrison's Principles of Internal Medicine, 18e.