This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallbladder Cancer, Subject name: Surgery
[{'content': 'Survival in unresectable carcinoma gall bladder is: \nSelect and explain. \nA. 4-6 months, B. 8-10 months, C. 1 year, D. 12-24 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. 4-6 months "Unresectable Carcinoma Gallbladder: Median survival for patients presenting with unresec table disease is 2-4 months with 1-year survival is less than 5%."', 'role': 'assistant'}]