This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'Rockall score is used in prognosis of \nSelect and explain. \nA. Upper GI bleed, B. Lower GI bleed, C. Hepatic encepholapathy, D. IBD', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rockall risk scoring system attempts to identify patients at risk of adverse outcome following acute upper gastrointestinal bleeding. Ref Davidson edition23rd pg ,793', 'role': 'assistant'}]