The entrance of the stomach is termed A: pyloric orifice B: cardiac orifice C: pyloric canal D: pyloric antrum

The opening of hepatopancreatic ampulla lies in () A: superior portion of duodenum B: pyloric antrum C: Calot's triangle D: major duodenal papilla E: minor duodenal papilla

Which of the following statements regarding peptic ulcers is CORRECT: A: In the stomach, they are usually in the antrum. B: In the duodenum, they are usually periampullary. C: Gastric ulcers are associated with increased gastric acid production. D: Benign ulcers can be reliably distinguished by their smaller size. E: Duodenal ulcers are prone to malignant transformation.