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
A thirty year old male presents to the emergency department with symptoms of epigastric pain radiating to back. He gives a history of epigastric pain that wakes him up at nights and is relieved by consuming food. His past history reveals past 2 episodes of perforated duodenal ulcers which were treated with omental patch surgeries. Pain before and after the surgery has been controlled with proton pump inhibitors and analgesics. The likely diagnosis on the occassion is 
Select and explain. 
A. Gastric ulcer, B. Atrophic gastritis, C. Duodenal ulcer, D. Chronic pancreatitis
C: Duodenal ulcer
Answer: C: Duodenal ulcer 
Explanation: None