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': 'Which of the following is the most common presenting symptom of non-cirrhotic portal hypertension ? \nSelect and explain. \nA. Chronic liver failure, B. Ascites, C. Upper gastrointestinal bleeding, D. Encephalopathy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]