This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
Most common cause of upper GI bleed is 
Select and explain. 
A. Duodenal ulcer, B. CA stomach, C. Oesophageal varices, D. Erosive gastritis
A: Duodenal ulcer
Answer: A: Duodenal ulcer 
Explanation: Most common cause of upper GI bleed is duodenal ulcer-33%. Other causes are gastric ulcer-21%, erosions-26%, mallery weis tears-4%, oesophageal varices-4%, tumours-0.5%, vascular lesions eg. Dieulafoy's disease-0.5% and others-5%. Reference : page 1063 Bailey and Love's sho practice of surgery 25th edition