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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Aery to bleed in duodenal ulcer haemorrhage -
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The correct answer is  Gastro duodenal aery is the most common aery involved in duodenal ulcer hemorrhage. Also, remember A peptic ulcer is the most common cause of massive upper gastrointestinal bleed (Duodenal ulcers > Gastric ulcers) Bleeding ulcers in the duodenum are usually located on the posterior surface of the duodenal bulb. Ref : Bailey & Love 25/e p1045