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: Medicine
[{'content': 'Acute hepatocellular failure in a patient of cirrhosis of liver is precipitated by - \nSelect and explain. \nA. Upper gastrointestinal bleeding, B. Large carbohydrate meal, C. Portal vein thrombosis, D. Intravenous albumin infusion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]