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
Most common cause of upper GI bleed 
Select and explain. 
A. Gastric cancer, B. Oesophageal varices, C. Duodenal ulcers, D. Gastric ulcers
C: Duodenal ulcers
Answer: C: Duodenal ulcers 
Explanation: Answer- C. Duodenal ulcersCauses ofupper GI bleeding (in descending order)Peptic ulcer - Duodenal ulcer - gastric ulcerOesophageal varicesGastritis erosionsMallory-Weiss tearsUncommon causes - Gastric carcinoma, esophagitis, pancreatits.